### Instruction:

Extract the cause and effect entities from the following sentence:
For some ~10 of AGN2 sources additional offset background fields are needed (~700ks total)

### Assistant:

KEYWORD: For some
CONDITION: are needed
VARIABLE: offset background fields
NOT_RELEVANT: (~700ks total).
CAUSE_1: ~10 of AGN2 sources
EFFECT_1: additional offset background fields are needed

