Complex sentence: Via a friend, Rupert Bartz, Plath met and later married Lydia Clara Bartz, Rupert's sister, although the couple was only together for a few months before the two drifted apart without legally ending the marriage.
Split into simpler sentences: Via a friend, Rupert Bartz, Plath met and later married Lydia Clara Bartz, Rupert's sister. The couple was only together for a couple months before the two drifted apart without legally ending the marriage.