Premise:
"You're going to get some powerful legal muscle there, Mr. Black said."
Hypothesis: It was said by Mr. Black that there were excellent lawyers to be found on this team.

yes

Premise:
"As she left the room, Poirot came over from the window where he had been standing, and sat down facing Miss Howard. "
Hypothesis: Poirot had to tell the woman about the murderer.

it is not possible to tell

Premise:
"EPA has solicited comments on the proposed information collection requirements to be sent to both EPA and OMB for consideration during the approval process."
Hypothesis: The EPA has asked for comments on the information collection requirements.
yes