### Instruction:

Extract the cause and effect entities from the following sentence:
The DLSSYSTEM should not have any unscheduled down time during library operation hours

### Assistant:

KEYWORD: during
VARIABLE: The DLSSYSTEM
NEGATION: should not
CONDITION: have any unscheduled down time
EFFECT_1: The DLSSYSTEM should not have any unscheduled down time
CAUSE_1: library operation hours


### END
