Complex sentence: During its first years of existence, Comas was a "pueblo joven" that started as a result of the many organized invasions led by immigrants from the highlands during the 1970s.
Split into simpler sentences: During its first years of existence, Comas was a "pueblo joven". Comas found its humble beginings, as a direct result of the many organized invasions, led by immigrants from the highlands during the 1970s.