### Instruction:

Extract the cause and effect entities from the following sentence:
Therefore REST is a compelling solution when having to manage loosely-coupled systems, where the different system components and devices have different uptimes

### Assistant:

KEYWORD: Therefore
VARIABLE: REST
CAUSE_1: having to manage loosely-coupled systems
AND: and
CONDITION: having to manage
EFFECT_1: REST is a compelling solution
CAUSE_2: the different system components
CAUSE_3: devices have different uptimes


### END
