### Instruction:

Extract the cause and effect entities from the following sentence:
Although AVHRR/3 is a six-channel radiometer, only five channels are transmitted to the ground at any given time, since channels 3a and 3b do not operate simultaneously

### Assistant:

NOT_RELEVANT: Although AVHRR/3 is a six-channel radiometer
KEYWORD: since
VARIABLE: 3b
CONDITION: operate simultaneously
AND: and
NEGATION: do not
CAUSE_2: 3b do not operate simultaneously
CAUSE_1: channels 3a
EFFECT_1: five channels are transmitted to the ground at any given time

