Complex sentence: Elaine shows up at the Costanzas'house with Winona's copy of the TV Guide much to her surprise, she sees the creepy guy at the house (he obtained the Costanzas' address by reading the postal address).
Split into simpler sentences: Elaine shows up at the Costanzas'house with Winona's copy of the TV Guide. Much to her surprise, she sees the creepy guy at the house (he obtained the Costanzas' address by reading the postal address).