Sentence 1: overhead cam diesel engine that represented a quantum leap in performance beyond Cummins' existing products.

Sentence 2: Representing a quantum leap in performance was the overhead cam diesel engine.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: but there's always a sell

Sentence 2: They don't in any way try to sell this to you.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Since 1990, she has worked in the Administrative Law Unit and Resource Development, and directed the Elder Law Project, serving the northern half of the state.

Sentence 2: The man resigned in 1990.
Is this second sentence entailed by the first?

Answer:
no