Complex sentence: Her political interest was according to herself sparked at her school, "Marienlyst skole", where discussions were common in class, and would include two students who were members of the Socialist Youth, one being her socialist-turned best friend.
Split into simpler sentences: Her political interest was according to herself sparked at her school, "Marienlyst skole", where discussions were common in class. These discussions would include two students who were members of the Socialist Youth, one being her socialist-turned best friend.