### Instruction:

Extract the cause and effect entities from the following sentence:
In this sense, the middleware layer in Wireless Sensor Networks has to implement some mechanisms in order to reach efficient deployments of context applications over Wireless Sensor Networks

### Assistant:

KEYWORD: in order
CONDITION: has to implement some mechanisms
VARIABLE: the middleware layer in Wireless Sensor Networks
EFFECT_1: to reach efficient deployments of context applications over Wireless Sensor Networks
NOT_RELEVANT: In this sense
CAUSE_1: the middleware layer in Wireless Sensor Networks has to implement some mechanisms

