### Instruction:

Extract the cause and effect entities from the following sentence:
The sequence of entering GTINs is important when a next lower level GTIN is to be linked

### Assistant:

VARIABLE: a next lower level GTIN
CONDITION: is to be linked
KEYWORD: when
EFFECT_1: The sequence of entering GTINs is important
CAUSE_1: a next lower level GTIN is to be linked

