Premise:
"Today it forms the foreground for the seated part of the Sound and Light Show."
Hypothesis: The Sound and Light show is 10 minutes long.

it is not possible to tell

Premise:
"They asked again, and again, and I declined with somewhat greater force."
Hypothesis: They asked multiple times and I kept declining.

yes

Premise:
"The most important are clustered around three adjoining the triangular Piazza della Ceterna named after the city's 13th-century travertine well, surrounded by elegant palaces; the Piazza del Duomo, grouping church and town hall as the center of civic and religious power; and the Piazza delle Erbe ?market place with twin Salvucci towers."
Hypothesis: The Piazza delle Erbe is home to a marketplace and a pair of towers.
yes