Premise:
"A Day of Service occurs on the day before the opening of a national conference."
Hypothesis: Before the opening Day of service will occur.

yes

Premise:
"John) is celebrated as the oldest building in Florence, and for the magnificent bas-reliefs of its three sets of bronze doors."
Hypothesis: John is not only the oldest building in Florence, but also the country.

it is not possible to tell

Premise:
"yeah i got a wait call hang on a second"
Hypothesis: I don't have any calls and I can talk now.
no