Given the task definition and input, reply with output. In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.

It means , to understand an war development , you should understand the ideas and cultural moviments that resulted in a particular period , and helped for the occuring of that war , for exemple . 

It means , to understand war development , you should understand the ideas and cultural movements that resulted in a particular period , and helped for the occurring of that war , for example . 