Question

The institute conducted investigations. (Begin the sentence with 'Investigations...)

Answer 1

Investigations were conducted by the Institute.

Answer 2

Investigations were conducted by the institute. This was the sentence in the active voice and had to be converted into the passive one.

So for this the predicate of the sentence had to be made the subject and vice versa.

In this case the last part of the sentence became the sentence and the rest of it continued just like it should be.