### Instruction:

Extract the cause and effect entities from the following sentence:
Requirement: In case a nominal patch of 400 deg2 cannot be completed in the allocated amount of observing time at a given epoch, the “lost” fields shall be situated at the edge of the patch

### Assistant:

NOT_RELEVANT: Requirement:
KEYWORD: In case
VARIABLE: the “lost” fields
CONDITION: shall be situated at the edge of the patch
CAUSE_1: a nominal patch of 400 deg2 cannot be completed in the allocated amount of observing time at a given epoch
EFFECT_1: the “lost” fields shall be situated at the edge of the patch
NEGATION: cannot

