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

Which of the following definitions best describes the class 'Uncle'?

A. A male relative who is a sibling of a parent, having at least one nephew or niece.
B. A sibling of either gender of a parent.
C. A parent, whether biological or stepparent and a sibling.
D. A female relative who is a sibling of a parent, having at least one nephew or niece.

Answer: A male relative who is a sibling of a parent, having at least one nephew or niece.