Simplify the following text for a Grade 8 native English-speaking person.
Original: Central Station ( lower level ) ( Hauptbahnhof unten ) , where U1 and U2 branch into two different lines and MÃ 1\/4 nchner Freiheit ( U3\/U6 ) also have four tracks .
Simplified: The stations Hauptbahnhof ( Central Station ) ( U1\/U2 ) and MÃ 1\/4 nchner Freiheit ( U3\/U6 ) have four tracks .