### Instruction:

Extract the cause and effect entities from the following sentence:
If the factor of safety is defined in terms of stress, it is the ratio of the ultimate or yield stress to the maximum design stress

### Assistant:

CAUSE_1: the factor of safety is defined in terms of stress
EFFECT_1: it is the ratio of the ultimate
EFFECT_2: yield stress to the maximum design stress
OR: or
KEYWORD: If
VARIABLE: it
CONDITION: yield stress to the maximum design stress

