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and
* the described situation that the utterance is about.

For example, a direct perception report such as Beryl saw Meryl feed the animals is analysed as asserting the existence of a past situation s which Beryl saw and which supports the infon corresponding to Meryl feed the animals. The verb see is thus treated as taking a situation rather than a proposition as its primary semantic argument.

More generally, sentences impose conditions on situations, and complex expressions (such as definite descriptions, quantifier phrases

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