Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
which were found
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "which were found" is correct and usable in written English.
You can use it when referring back to something that has already been mentioned. Example sentence: The police searched the garden and found several clues, which were found to be related to the crime.
✓ Grammatically correct
News & Media
Science
Academia
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
At the time I made notes of my impressions which were found amongst my papers.
Academia
That scandal prompted a nationwide investigation into counterfeit academic credentials, which were found to be widespread.
News & Media
Officials planned to count the ballots, which were found stuck in voting machines.
News & Media
Those species include dolphins, which were found dead at four times the normal rate last year.
News & Media
There were another 8,000 IEDs which were found and cleared.
News & Media
The trousers and shoes he had worn that night, which were found later, were bloodstained.
News & Media
Goldstine and von Neumann programmed the binary conversions which were found to take only about 5 milliseconds.
Academia
Coffee or tea, say researchers, which were found to reduce the risk of developing type 2 diabetes.
Academia
These measurements were summarised into hierarchical deformation mechanisms, which were found to contribute at varying strains.
Science
Then, the synthesized catalysts were tested under the optimal conditions which were found through CCDs.
Abdominal aortas, which were found slightly thicker than thoracic aortas, were characterized by a higher modulus.
Science
Expert writing Tips
Best practice
Use "which were found" to add descriptive information about something previously mentioned in your sentence, ensuring clarity and flow.
Common error
Avoid using "that" instead of "which" when introducing non-restrictive clauses that provide additional, non-essential information. "Which" is appropriate when the clause can be removed without changing the sentence's core meaning.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "which were found" functions as a relative clause, specifically a non-restrictive (or non-essential) clause. This type of clause adds extra information to a noun phrase but is not essential to the sentence's core meaning. As confirmed by Ludwig, it's grammatically correct and widely used.
Frequent in
News & Media
37%
Science
45%
Academia
10%
Less common in
Encyclopedias
3%
Formal & Business
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "which were found" is a grammatically sound and frequently used relative clause for adding descriptive details. It is deemed correct and usable in written English, according to Ludwig. Its prevalence spans across diverse contexts, notably in news, science, and academic writing. While it maintains a neutral register applicable in various settings, the examples provided by Ludwig underline its versatility and appropriateness in formal writing. The choice between "which" and "that" depends on whether the clause is essential or merely provides additional information.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
that were discovered
Replaces "found" with "discovered", emphasizing the act of uncovering something previously unknown.
that were located
Substitutes "found" with "located", focusing on the placement or position of something.
which had been located
Adds "had been" to emphasize that the location happened in the past.
that were detected
Replaces "found" with "detected", implying the use of instruments or methods to identify something.
that were identified
Substitutes "found" with "identified", highlighting the recognition or classification of something.
which came to light
Uses a more idiomatic expression to indicate that something became known or apparent.
that turned up
Offers a more casual alternative to "found", suggesting something appeared unexpectedly.
that surfaced
Implies that something previously hidden or submerged became visible or known.
which were revealed
Uses "revealed" to suggest that something was disclosed or uncovered, often after being concealed.
that were unearthed
Replaces "found" with "unearthed", emphasizing the act of digging or uncovering something buried.
FAQs
How do I use "which were found" in a sentence?
Use "which were found" to introduce a non-restrictive clause that provides additional information about something already mentioned. For example, "The artifacts, "which were found" during the excavation, are now on display."
What are some alternatives to "which were found"?
You can use alternatives like "that were discovered", "that were located", or "which came to light" depending on the context.
Is it correct to use "that were found" instead of "which were found"?
While "that" can introduce restrictive clauses, "which" is generally preferred for non-restrictive clauses that add extra information. Using "which" ensures clarity, especially when the clause is not essential to the sentence's core meaning.
What's the difference between "that were found" and "which were found"?
"That were found" typically introduces essential information, while "which were found" adds extra, non-essential details. The choice depends on whether the clause is crucial to understanding the sentence.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested