Complex sentence: On the street Llewyn grabs what appears to be the Gorfeins'orange cat; that evening he takes the cat back, but insults the Gorfeins' guests and refuses to play for them.
Split into simpler sentences: On the street Llewyn grabs what appears to be the Gorfeins'orange cat. That evening he takes the cat back, but insults the Gorfeins' guests and refuses to play for them.