### Instruction:

Extract the cause and effect entities from the following sentence:
Each dish or aperture array system shall have the capability to answer to an operator interrogation, in case of detected failures at the dish, which antenna chain has failed

### Assistant:

VARIABLE: failures at the dish
OR: or
CONDITION: detected
KEYWORD: in case of
CAUSE_1: detected failures at the dish
EFFECT_1: Each dish
EFFECT_2: which antenna chain has failed

