### Instruction:

Extract the cause and effect entities from the following sentence:
Message-oriented middleware uses the publish-subscribe mechanism to facilitate message exchange between nodes and the sink nodes

### Assistant:

CONDITION: uses the publish-subscribe mechanism
VARIABLE: message exchange between nodes and the sink nodes
CAUSE_1: Message-oriented middleware uses the publish-subscribe mechanism
EFFECT_1: to facilitate message exchange between nodes and the sink nodes


### END
