### Instruction:

Extract the cause and effect entities from the following sentence:
Human in the Loop (HITL) is a method of demonstration that may be used to verify complex integrated crew requirements

### Assistant:

CAUSE_1: is a method of demonstration
KEYWORD: that may be used
EFFECT_1: to verify complex integrated crew requirements
NOT_RELEVANT: (HITL)
VARIABLE: complex integrated crew requirements
CONDITION: to verify

