### Instruction:

Extract the cause and effect entities from the following sentence:
The spectral channel, identified by the index k, has an associated spectral variable, ξ k, where this location corresponds to the position of its spectral response function centroid

### Assistant:

VARIABLE: this location
CONDITION: corresponds to the position of its spectral response function centroid
KEYWORD: where
CAUSE_1: The spectral channel, identified by the index k, has an associated spectral variable, ξ k,
EFFECT_1: this location corresponds to the position of its spectral response function centroid

