Simplify the following text for a Grade 6 native English-speaking person.
Original: The club re-emerged after World War II in 1949 as BSG Franz Mehring Grube , becoming BSG Aktivist Brieske-Ost in 1950 .
Simplified: In 1949 the club was refounded as BSG Franz Mehring Grube , becoming BSG Aktivist Brieske-Ost in 1950 .