Problem: Determine the topic of the passage. "Constituting roughly 15% to 20% of households is the upper or professional middle class consisting of highly educated, salaried professionals and managers." Topic:

A: American middle class


Problem: Determine the topic of the passage. "Firebird is an open source SQL relational database management system that runs on Linux , Windows , and a variety of Unix ." Topic:

A: Firebird (database server)


Problem: Determine the topic of the passage. "Both satellites were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology , accompanied their father Ares , god of war, into battle." Topic:

A: Moons of Mars


Problem: Determine the topic of the passage. "In baseball , a cutter, or cut fastball, is a type of fastball which breaks slightly toward the pitcher 's glove side as it reaches home plate ." Topic:

A:
Cutter (baseball)