### Instruction:

Extract the cause and effect entities from the following sentence:
Once the GEO data are merged, LEO data and GEO data can be merged; in areas not covered by GEO observations the following stage of the merging process is based on LEO-only data

### Assistant:

KEYWORD: in
VARIABLE: the following stage of the merging process
CONDITION: is based on LEO-only data
CAUSE_1: the GEO data are merged
AND: and
EFFECT_1: LEO data
EFFECT_2: GEO data can be merged
NEGATION: not
CAUSE_2: areas not covered by GEO observations
EFFECT_3: the following stage of the merging process is based on LEO-only data

