Complex sentence: From Greek mythology, Sitney wrote the statue featured in the prologue may be either Apollo or Orpheus, and if the artistic and doomed Agnes matches Orpheus as well as Bergman, Agnes' mother is Eurydice, representing "the green world".
Split into simpler sentences: From Greek mythology, Sitney wrote the statue featured in the prologue may be either Apollo or Orpheus. If the artistic and doomed Agnes matches Orpheus as well as Bergman, Agnes' mother may correspond to Eurydice, representing "the green world".