### Instruction:

Extract the cause and effect entities from the following sentence:
Per definition, it is not possible to correctly interpret carbon cycle simulations if the overall-, user-, and producer accuracy is not known (Jung et al

### Assistant:

NOT_RELEVANT: (Jung et al
KEYWORD: if
VARIABLE: producer accuracy
CONDITION: known
EFFECT_1: it is not possible to correctly interpret carbon cycle simulations
AND: and
CAUSE_3: producer accuracy is not known
CAUSE_1: the overall-
CAUSE_2: user-
NEGATION: is not

