Complex sentence: A small council of students from neighboring Cobb County Schools met and chose Hillgrove's mascot, the hawk, after noticing that many indigenous hawks live on the property Hillgrove was built on.
Split into simpler sentences: A small council of students from neighboring Cobb County Schools met to choose Hillgrove's mascot, the hawk. The hawk was chosen as the mascot because the students noticed many indigenous hawks lived around the property Hillgrove was built on.