Question: each of us is required to cooperate in, and maintain the confidentiality of, any such investigation.
Answer: --> Each of us is required to cooperate in, and maintain the confidentiality of, any such investigation.

Question: then, this elixir were discovered antibiotics and antiviral substances very powerful, which explains its use with success against infectious diseases.
Answer: --> Then, this elixir were discovered antibiotics and antiviral substances very powerful, which explains its use with success against infectious diseases.

Question: miniature ascribed to jacob van doordt. the locket was made by paul kurtz, possibly in 1656.
Answer:
--> Miniature ascribed to Jacob van Doordt. The locket was made by Paul Kurtz, possibly in 1656.