Premise:
"It is a very simple, low-key site, housed in a small 19th-century building."
Hypothesis: The site is very simple in nature.

yes

Premise:
"Dave frowned, and then relaxed."
Hypothesis: Dave is anxious.

no

Premise:
"He agreed that the authority issue is important, but he suggested smaller, targeted research studies could address that question."
Hypothesis: He said that the authority issue did not matter.
no