Problem: Answer this question: what is middle class in the us?

A: Constituting roughly 15% to 20% of households is the upper or professional middle class consisting of highly educated, salaried professionals and managers.


Problem: Answer this question: What is firebird server?

A: Firebird is an open source SQL relational database management system that runs on Linux , Windows , and a variety of Unix .


Problem: Answer this question: who discovered the 2 moons of mars,Phobos and Deimos?

A: 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.


Problem: Answer this question: what does a cutter do?

A:
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 .