### Instruction:

Extract the cause and effect entities from the following sentence:
As d earlier, voice communication is not currently considered for the manned aircraft applications and therefore was not the focus of prior FCSs

### Assistant:

NOT_RELEVANT: As d earlier
VARIABLE: voice communication
NEGATION: was not
CONDITION: the focus of prior FCSs
KEYWORD: and therefore
EFFECT_1: was not the focus of prior FCSs
CAUSE_1: voice communication is not currently considered for the manned aircraft applications

