I would say in the brainstorming process.
Answer:
Linking verb.
Explanation:
It's not action because an action verb would be in the present tense.
And it's not a helping verb because it just isn't.
There are 27 helping verbs; Am, is, are, was and were, being, been, and be, Have, has, had, do, does, did, will, would, shall, should, may, might, must, can, could.
None of these are went, thus proving that it isn't a helping verb.
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