### Instruction:

Extract the cause and effect entities from the following sentence:
This is accomplished if the variance of the residual shear systematics is controlled This requirement is essential for the WL survey to reach the cosmological objectives, see [RD03]

### Assistant:

VARIABLE: the WL survey
CONDITION: to reach the cosmological objectives
EFFECT_1: This is accomplished
KEYWORD: is essential for
CAUSE_1: the variance of the residual shear systematics is controlled
CAUSE_2: This requirement
EFFECT_2: the WL survey to reach the cosmological objectives
NOT_RELEVANT: see [RD03]


### END
