### Instruction:

Extract the cause and effect entities from the following sentence:
For services of this kind to be helpful, they must be consistent with existent European policy structure (e.g. EU Clean Air For Europe (CAFE), Convention on Long-range Transboundary Air Pollution)

### Assistant:

EFFECT_1: services of this kind to be helpful
CAUSE_1: they must be consistent with existent European policy structure
NOT_RELEVANT: (e.g. EU Clean Air For Europe (CAFE), Convention on Long-range Transboundary Air Pollution)
VARIABLE: they
CONDITION: must be consistent with existent European policy structure
KEYWORD: For

