### Instruction:

Extract the cause and effect entities from the following sentence:
If some proposed requirements cannot be met, either the architectural design or the requirements themselves need to be changed as previously described in section 3.1

### Assistant:

KEYWORD: If
VARIABLE: the requirements themselves
CONDITION: need to be changed as previously described in section 3.1
NEGATION: cannot
OR: or
CAUSE_1: some proposed requirements cannot be met
EFFECT_1: the architectural design
EFFECT_2: the requirements themselves need to be changed as previously described in section 3.1

