### Instruction:

Extract the cause and effect entities from the following sentence:
In general, pollution of the application space should be avoided especially when devices from different networking technologies are expected to communicate together (they will usually do that, either directly or indirectly through an IP network)

### Assistant:

KEYWORD: especially when
VARIABLE: pollution of the application space
CONDITION: should be avoided
CAUSE_1: devices from different networking technologies are expected to communicate together
NOT_RELEVANT: In general
EFFECT_1: pollution of the application space should be avoided

