### Instruction:

Extract the cause and effect entities from the following sentence:
The TMT Observatory shall implement an observing backup process to prepare and execute backup programs for observations in the event that weather conditions or technical failures prevent the planned observation from taking place

### Assistant:

VARIABLE: technical failures
CONDITION: the planned observation from taking place
AND: and
KEYWORD: in the event that
OR: or
NEGATION: prevent
CAUSE_1: The TMT Observatory shall implement an observing backup process
EFFECT_1: to prepare
EFFECT_2: execute backup programs for observations
CAUSE_2: weather conditions
CAUSE_3: technical failures prevent the planned observation from taking place

