### Instruction:

Extract the cause and effect entities from the following sentence:
In classic airspace where data communications will be available but not required, information exchange can take place with data communications for participating aircraft to provide an operational advantage

### Assistant:

KEYWORD: where
VARIABLE: information exchange
CONDITION: can take place with data communications for participating aircraft to provide an operational advantage
AND: but
NEGATION: not
EFFECT_1: information exchange can take place with data communications for participating aircraft to provide an operational advantage
CAUSE_1: classic airspace
CAUSE_2: data communications will be available
CAUSE_3: not required

