In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Under which conditions would a sugar cube dissolve most quickly when placed in a liter of water at room temperature? Answer: A crushed sugar cube is added and the water is stirred.
Under a crushed sugar cube is added and the water is stirred conditions would a sugar cube dissolve most quickly when placed in a liter of water at room temperature.

Question: On how many of the continents do birds live and breed? Answer: seven
Birds live and breed on seven of the continents.

Question: What occurs when an unstable nucleus emits a beta particle and energy? Answer: beta decay

Beta decay occurs when an unstable nucleus emits a beta particle and energy.