Part 1. Definition
Given a sentence in Spanish, generate a new Spanish sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.
Part 2. Example
Es probable que encuentres un planeta en el sistema solar.
Answer: Es desafortunado encontrar un planeta en el sistema solar.
Explanation: This is a good example of a change in the input. The created sentence is semantically similar to the input as both are talking about finding a planet in the solar system and the changes in the sentence follows the commonsense knowledge.
Part 3. Exercise
Algunos patos nadan en el agua.
Answer:
Algunas aves permanecen en el agua.