### Instruction:

Extract the cause and effect entities from the following sentence:
When the need arises, operational flexibility is required to allow the ISS Program to fly additional passive cargo within the mass and volume of the powered lockers

### Assistant:

CAUSE_1: the need arises
CAUSE_2: operational flexibility is required
EFFECT_1: to allow the ISS Program to fly additional passive cargo within the mass
EFFECT_2: volume of the powered lockers
AND: and
KEYWORD: When
VARIABLE: the ISS Program
CONDITION: volume of the powered lockers

