Complex sentence: The band Halifax started in Thousand Oaks, California as simple leisure activities of Dan and Matt Locascio, Justin Chlowitz and guitarist Chris Brandt, would write songs out of boredom in The Locascio's parents' house.
Split into simpler sentences: The band Halifax started in Thousand Oaks, California as a simple leisure activity. Out of boredom, Dan Locascio, Matt Locascio, Justin Chlowitz and guitarist Chris Brandt would write songs at the Locascios' house.