### Instruction:

Extract the cause and effect entities from the following sentence:
If an attribute is left blank or not defined, the product description exists only of attributes populated

### Assistant:

KEYWORD: If
VARIABLE: the product description
CONDITION: exists only of attributes populated
OR: or
NEGATION: not
CAUSE_1: an attribute is left blank
CAUSE_2: not defined
EFFECT_1: the product description exists only of attributes populated

