### Instruction:

Extract the cause and effect entities from the following sentence:
Discussion: If there are TMT external archives or data centers, the storage systems will be able to retain the most recent two years of science datasets

### Assistant:

NOT_RELEVANT: Discussion:
KEYWORD: If
VARIABLE: the storage systems
CONDITION: will be able to retain the most recent two years of science datasets
OR: or
CAUSE_1: there are TMT external archives
CAUSE_2: data centers
EFFECT_1: the storage systems will be able to retain the most recent two years of science datasets

