Dancer is related to Activity. Activity is related to Ritual. Ritual is related to Ceremony. Ceremony is a type of Affair. 
Sequence is a type of Repeat. Repeat is related to While. While is related to Dream. 
Dancer <--RelatedTo--> Activity <--RelatedTo--> Ritual <--RelatedTo--> Ceremony --IsA--> Affair 
Sequence --IsA--> Repeat <--RelatedTo--> While <--RelatedTo--> Dream 