Task: Instance Class Understanding (ontology: Arts_Media_Entertainment/Propp)

Which of the following classes does '"Origin of knee-caps."' belong to? Context: "Terminal motif A1312.1"

A. "Conflict of good and evil creators."
B. "Origin of human skeleton."
C. "Conflicts of the gods."
D. "Mankind emerges from ground."

Answer: "Origin of human skeleton."