### Instruction:

Extract the cause and effect entities from the following sentence:
These requirements and practices are optional for equipment used at manufacturing, development, and test sites

### Assistant:

CAUSE_1: equipment used at manufacturing
CAUSE_2: development
CAUSE_3: test sites
AND: and
EFFECT_1: These requirements
EFFECT_2: practices are optional
KEYWORD: for
VARIABLE: equipment
CONDITION: test sites

