Sentence 1: GAO, headed by the Comptroller General, is a principal means by which the legislative branch conducts oversight of executive programs and activities.

Sentence 2: The Comptroller General also provides his guidance for compliance to newly implemented standards.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: "According to what I've heard," Drew said, "this Kitchell claims to lead a regular Confederate force that hasn't surrendered.

Sentence 2: Drew said that Kitchell claimed he was in charge of a Confederate force.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: And if things go well, you were behind the commander in chief all the way.

Sentence 2: If things are going well in Iraq, than you support what the President is doing there.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell