Add punctuation: Before you can open a XDSL file youll need to figure out what kind of file the XDSL file extension refers to
A: Before you can open a XDSL file, you'll need to figure out what kind of file the XDSL file extension refers to.

Add punctuation: Old and young and manifestations of syphilis
A: Old and young, and manifestations of syphilis

Add punctuation: Right in the vicinity of the fishermens village Vang we find the water mill Vandmlle which is protected as a historical monument
A:
Right in the vicinity of the fishermen's village Vang we find the water mill (Vandmlle) which is protected as a historical monument.