Sentence 1: do you think that's the main reason do you think the

Sentence 2: I think that is the main reason.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: There are also lots of late-night clubs.

Sentence 2: The late-night clubs are expensive.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: oh it's horrible isn't it

Sentence 2: It's great, don't you think?
Is this second sentence entailed by the first?

Answer:
no