Answer
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Work Step by Step
In both sentences, the prepositional phrases "by the barn" and "by the farmer" serve as adjuncts, providing additional information about the action of building the pigpen. However, the key distinction lies in the semantic role of the noun phrases "the barn" and "the farmer."
In the first sentence, "by the barn," the prepositional phrase identifies the location where the action of building occurred. Here, "the barn" is the location where the pigpen was built.
In the second sentence, "by the farmer," the prepositional phrase identifies the agent or doer of the action. In this case, "the farmer" is the one who built the pigpen.
To program a machine to make such distinctions, it would need to analyze the semantic roles of the nouns within the prepositional phrases. This could involve employing natural language processing techniques to parse the sentence structure, identify the roles of the nouns (e.g., location or agent), and understand the context in which they are used to determine the correct interpretation. Additionally, machine learning algorithms could be trained on annotated data to recognize and classify these semantic roles accurately.
