which are known

USAGE SUMMARY

"which are known" is a correct and usable phrase in written English.
You can use it when referring to something that has been previously mentioned or established. For example: "The apple tree is one of the most iconic trees, which are known for their delicious fruit."

✓ Grammatically correct

News & Media

Science

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

This kills dividing cells, in particular cancer cells, which are known for rapid proliferation.

University of California, Berkeley

The other two got nothing, her will said, for "reasons which are known to them".

The New York Times

Coffee producers in Kenya and Ethiopia, which are known for coffee quality, have profited handsomely.

The New York Times

Iraq has so far rejected such arrangements, which are known as production sharing agreements.

The New York Times

The bulletins, which are known as T.S.B.'s, are compiled at the alldatapro.com Web site.

The New York Times

Removing the charge, he added, is a black art, few details of which are known publicly.

The New York Times

It is also notable for its liquor distilleries, the products of which are known throughout China.

Britannica

The latter activations, which are known as ponto-geniculo-occipital waves, also occur in humans.

Britannica

That's especially true for Uranus and Neptune, which are known as the ice giants.

The New York Times - Science

The chemicals included toxic air pollutants, some of which are known to cause cancer.

The Washington Post

It's also an attractive proposition for the small businesses hosting bags, which are known as StashPoints.

The Guardian

Expert writing Tips

Best practice

Use "which are known" to introduce non-essential information, setting it off with commas. This adds detail without disrupting the sentence's core meaning.

Common error

Avoid using "that" instead of "which" when introducing non-restrictive clauses. "Which" is generally preferred for non-essential information, set off by commas, whereas "that" introduces essential information.

Linguistic Context

The phrase "which are known" functions as a non-restrictive relative clause, providing additional, non-essential information about a preceding noun. As Ludwig AI points out, it's grammatically correct and widely used.

Expression frequency: Very common

Frequent in

News & Media

37%

Science

35%

Encyclopedias

6%

Less common in

Wiki

5%

Formal & Business

3%

Academia

2%

Ludwig's WRAP-UP

In summary, the phrase "which are known" serves as a versatile non-restrictive relative clause, enhancing sentences with additional context and descriptive details. Grammatically sound and widely recognized, as Ludwig AI confirms, it finds frequent application across various domains, particularly in news, scientific, and encyclopedic contexts. When using this phrase, remember to set it off with commas to maintain clarity and adhere to best practices. This guide offers related alternatives, writing tips, and addresses common errors to ensure effective communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

that are known

Simple substitution of "which" with "that", slightly less formal.

that are recognized

Replaces "known" with "recognized", emphasizing acknowledgement.

that are established

Substitutes "known" with "established", focusing on confirmation and acceptance.

which are recognized

Replaces "known" with "recognized", indicating acknowledgment or awareness.

that have been identified

Replaces "known" with "identified", specifying a process of discovery.

which have been identified

Substitutes "are known" with "have been identified", emphasizing discovery or determination.

that are well-known

Adds "well-" to "known", indicating widespread familiarity.

which are well-known

Adding the adjective "well-known" adds an emphasis on the degree of being known.

as is known

Rephrases as a standalone clause emphasizing common knowledge.

as everyone knows

Turns the phrase into a general statement of common knowledge, more informal.

FAQs

How to use "which are known" in a sentence?

Use "which are known" to add extra, non-essential information to a noun phrase, setting it off with commas. For example, "Apples, "which are known" for their nutritional value, are a popular fruit."

What can I say instead of "which are known"?

You can use alternatives like "that are recognized", "that are established", or "which are recognized" depending on the context.

Which is correct, "which are known" or "that are known"?

Both "which are known" and "that are known" can be grammatically correct, but they are used in different contexts. "Which" is typically used for non-restrictive clauses (additional information), while "that" is used for restrictive clauses (essential information).

What's the difference between "which are known" and "as everyone knows"?

"Which are known" is used to add a descriptive detail about something previously mentioned, whereas "as everyone knows" introduces a fact that is presumed to be common knowledge.