### Instruction:

Extract the cause and effect entities from the following sentence:
Business Rules: An inner pack can only contain the same GTIN, and inner pack sizing must be constant

### Assistant:

NOT_RELEVANT: Business Rules:
VARIABLE: inner pack sizing
CONDITION: must be constant
CAUSE_1: An inner pack
AND: and
EFFECT_1: can only contain the same GTIN
EFFECT_2: inner pack sizing must be constant

