What would be the topic sentence? "first of all, being alive and healthy is key to a persons happiness. for example, my friends mom, a poor woman, went through this situation a few years ago." which one of the two sentences is the topic sentence? or is it both?

after the signature of the treaty of versailles in june 1919, germany lost nearly 25,000 square miles and a population of 7 million people. these territories included eupen-malmedy area and moresnet which were ceded to belgium. regarding relations with france, germany ceded the sovereignty of the saar coal mines to this country, as well as the provinces of alsace-lorraine.

explanation:

line 5 is one of them idk the other one