### Instruction:

Extract the cause and effect entities from the following sentence:
In each sub-section where the implementation of a requirement is described then this is clearly indicated to provide additional traceability

### Assistant:

VARIABLE: additional traceability
KEYWORD: then
CONDITION: to provide
EFFECT_1: this is clearly indicated
EFFECT_2: to provide additional traceability
CAUSE_1: In each sub-section
CAUSE_2: the implementation of a requirement is described

