### Instruction:

Extract the cause and effect entities from the following sentence:
Discussion: Backup observing programs will be prepared for all TMT observing service queue programs in the event that weather conditions or technical failures prevent the execution of the primary science program

### Assistant:

NOT_RELEVANT: Discussion:
VARIABLE: all TMT observing service queue programs
CONDITION: the execution of the primary science program
KEYWORD: for
OR: or
NEGATION: prevent
CAUSE_2: weather conditions
CAUSE_3: technical failures prevent the execution of the primary science program
EFFECT_1: Backup observing programs will be prepared
CAUSE_1: all TMT observing service queue programs

