Sentence 1: The united countries defeated the Teutonic Knights at the Battle of Grunwald in 1410 and repelled Germanic eastward expansion.

Sentence 2: Lithuania and Poland joined forces to fight the Teutonic Knights in Grunwald.
Is this second sentence entailed by the first?

Answer: it is not possible to tell

Sentence 1: Voices rose near at hand, for tea was spread out under the sycamore-tree, as it had been on the day of my arrival.

Sentence 2: There is tea under the sycamore tree.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: and everybody that we have that backs up to it mows about uh oh maybe ten or fifteen or twenty yards into the vacant lot to keep weeds from growing and coming over and seeding in your yard

Sentence 2: Everyone behind us mows the lot.
Is this second sentence entailed by the first?

Answer:
yes