Sentence 1: sulfur levels, a 4 percent sulfur coal can increase consumption by about one-third.

Sentence 2: A 4% sulfur coal can increase use by 1/3
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: right but we really i mean really and truly we just don't have a quarterback

Sentence 2: We do not have a quarterback.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: Perhaps he might tell them something concerning Mrs. Vandemeyer which might lead to a clue to Tommy's whereabouts.

Sentence 2: Both Tommy and Mrs. Vandemeyer are missing.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell