### Instruction:

Extract the cause and effect entities from the following sentence:
Due to limitations in the number of docking ports on the ISS, the spacecraft may need to be relocated from one docking port to another during ISS increment operations to provide operational flexibility

### Assistant:

CAUSE_1: limitations in the number of docking ports on the ISS
EFFECT_1: the spacecraft may need to be relocated from one docking port to another
KEYWORD: Due to
CAUSE_2: ISS increment operations
EFFECT_2: to provide operational flexibility
VARIABLE: operational flexibility
CONDITION: to provide

