Task: Paraphrasing
Input (English): Question: If the buoyant force is greater than the force of gravity acting on a ship, what will happen to the ship? 
Answer: it will float. 
Sentence: If the buoyant force is greater than the force of gravity acting on a ship, it will float.
Output (English): A ship can only float when the buoyant force is greater than the force of gravity acting on that ship.