### Instruction:

Extract the cause and effect entities from the following sentence:
The survey depth will be achieved by repeating about 40 times the observations of the same fields using the same wide survey observing modes

### Assistant:

VARIABLE: the observations of the same fields
CONDITION: using the same wide survey observing modes
EFFECT_1: The survey depth will be achieved
KEYWORD: by
CAUSE_1: repeating about 40 times the observations of the same fields
CAUSE_2: using the same wide survey observing modes

