### Instruction:

Extract the cause and effect entities from the following sentence:
Robotics is the preferred means of performing maintenance due to the limited availability of the crew; however, early phases of Gateway assembly will be solely reliant on crew for maintenance

### Assistant:

CAUSE_1: the limited availability of the crew
EFFECT_1: will be solely reliant on crew for maintenance
KEYWORD: due to
VARIABLE: phases of Gateway assembly
CONDITION: will be solely reliant on crew for maintenance
NOT_RELEVANT: however
CAUSE_2: early phases of Gateway assembly

