Free group of rank two is SQ-universal

This article gives the statement, and possibly proof, of a particular group or type of group (namely, Free group:F2 (?)) satisfying a particular group property (namely, SQ-universal group (?)).

Statement

The free group of rank two is a SQ-universal group. In other words, every finitely generated group is isomorphic to a subquotient (i.e., a quotient group of a [subgroup]]) of the group.