### Instruction:

Extract the cause and effect entities from the following sentence:
As valves subject to this Specification have to have a safety factor of at least 2.5, analysis is not generally required for shear valves unless there is measurable deformation

### Assistant:

CAUSE_1: there is measurable deformation
NEGATION: is not
EFFECT_1: analysis is not generally required for shear valves
VARIABLE: analysis
CONDITION: generally required for shear valves
NOT_RELEVANT: As valves subject to this Specification have to have a safety factor of at least 2.5,


### END
