Is the word after a preposition or adverb in sentence After farmer harvested corn he sold it as ensilage?

The word after the preposition in the sentence "After the farmer harvested the corn, he sold it as ensilage" is harvested.

Here's why:

* Preposition: "After" is a preposition, and it indicates a point in time.

* Object of the preposition: The phrase "the farmer harvested the corn" acts as the object of the preposition "after".

* Verb: "Harvested" is the verb within the prepositional phrase.

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