### Instruction:

Extract the cause and effect entities from the following sentence:
In the case of specialist subcontractors it is not necessary to issue them with NERS passports

### Assistant:

KEYWORD: In the case of
CAUSE_1: specialist subcontractors
EFFECT_1: it is not necessary to issue them with NERS passports
NEGATION: is not
VARIABLE: specialist subcontractors
CONDITION: necessary to issue them with NERS passports

