The phrase "which were conducted" is correct and usable in written English.
You can use it to link two clauses together, where the first clause contains the main idea, and the second clause provides additional information. For example: "We received a number of surveys, which were conducted by the research team."
In the most recent statewide polls, which were conducted before the verdict, Mr. Simon was closing on Mr. Davis.
But the negotiations, which were conducted nation by nation, have moved slowly, and only Uganda, Rwanda and Senegal have agreements.
However, the public has not accepted the tests, which were conducted largely behind closed doors.
This report is to rectify the shortcomings of the Hutton and Butler inquiries, which were conducted far too soon and therefore were necessarily whitewashes.
Footage of these experiments, which were conducted over several years, is poignant, as the kids struggle to delay gratification for just a little bit longer.
There were young people of all ages in the classes, which were conducted in English and Albanian, and our kids loved being part of it.
The discussions, which were conducted informally in the last few weeks, are at an early stage and may not result in any deal.
Mr. Washington said it was unclear whether any inmates saw the searches, which were conducted in front of jail staff members and other students.
The Agriculture Department's Food Safety and Inspection Service is preparing a report on the extensive plant reviews, which were conducted in late March.
Mr. Weitzman cited several cases in which commercial property owners succeeded in having their assessed values reduced after informal hearings, which were conducted last fall.
Instead, the group focused on aspects like T-Mobile's aesthetics tests, which were conducted using a crane extending to 65 feet, the height of the proposed tower.
