### Instruction:

Extract the cause and effect entities from the following sentence:
Data precision for LAGEOS NPT shall be < 1.5 mm when averaged over a one month period

### Assistant:

CAUSE_1: averaged over a one month period
EFFECT_1: Data precision for LAGEOS NPT shall be < 1.5 mm
KEYWORD: when
VARIABLE: Data precision for LAGEOS NPT
CONDITION: averaged over a one month period

