Sentence 1: There are in fact four separate schools within the structure and each one has its own portal and inner courtyard.

Sentence 2: There is just one school within the structure.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: As the city expands, so do the shopping facilities.

Sentence 2: The city's growth has stagnated in recent years.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: Instead of paying $100 for seed that should last 10 years, you pay $10 for new seed each year, which insures you against the possibility of a disastrous and expensive crop loss.

Sentence 2: The $10 seed is genetically modified.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell