Premise:
"A signpost flashed by the train window."
Hypothesis: The train was one that did not have any windows.

no

Premise:
"The Ca' Rezzonico is itself a fine specimen of the 18th-century Venetian art for which it is now a museum."
Hypothesis: A fine specimen of 19th-century Venetian art is the Ca' Rezzonico.

no

Premise:
"The blanket was shown, allowing the black to sniff down its surface, before it was flapped back and forth across the colt's back, and finally left there."
Hypothesis: The blanket was visible as it moved back and forth on the colt's back.
yes