Premise:
"Finally, he was safe inside OCA headquarters, part of a 30-story complex."
Hypothesis: OCA headquarters is part of a 30-story complex.

yes

Premise:
"The big prize was gold, particularly in South America, so for a while Madrid regarded the Caribbean chain as islands of Peru where the galleons could stop for fresh water."
Hypothesis: South Americans wanted silver.

no

Premise:
"One of the nice things about Java is that the most difficult parts of C (indirection and pointer arithmetic, among other things) have been left out of the language, while other convenience features unavailable in C (such as memory management) have been added to it."
Hypothesis: There aren't any nice things about Java.
no