### Instruction:

Extract the cause and effect entities from the following sentence:
For example, for the models operated at MPI-M (JS-BACH, REMO), all Olson classes (or fractions of), that are transferred into grasses, the separation into C3 and C4 grasses is conducted is based on work by Knorr (1997)

### Assistant:

VARIABLE: the separation into C3 and C4 grasses
CONDITION: is conducted is based on work by Knorr
NOT_RELEVANT: For example
CAUSE_1: the models operated at MPI-M
CAUSE_2: that are transferred into grasses
EFFECT_1: the separation into C3 and C4 grasses is conducted is based on work by Knorr
KEYWORD: for

