### Instruction:

Extract the cause and effect entities from the following sentence:
Rationale: DSG-SPEC-MECH-017, Gateway Program Docking System Specification compliant mechanisms only provide an 800mm diameter passageway for a distance of 3-4 ft when mated

### Assistant:

NOT_RELEVANT: DSG-SPEC-MECH-017
KEYWORD: when
CAUSE_1: mated
EFFECT_1: Gateway Program Docking System Specification compliant mechanisms only provide an 800mm diameter passageway for a distance of 3-4 ft
CONDITION: only provide an 800mm diameter passageway for a distance of 3-4 ft
VARIABLE: Gateway Program Docking System Specification compliant mechanisms

