### Instruction:

Extract the cause and effect entities from the following sentence:
Discussion: Attention must be given to making instruments mechanically rigid so that calibration data taken during the day can be applied to science observations acquired at night

### Assistant:

NOT_RELEVANT: Discussion:
VARIABLE: calibration data taken during the day
CONDITION: acquired at night
KEYWORD: so that
CAUSE_1: Attention must be given to making instruments mechanically rigid
EFFECT_1: calibration data taken during the day can be applied to science observations
CAUSE_2: acquired at night

