Complex sentence: When she was growing up, Melinda McDonough's parents thought that there was something wrong with their child's brain, it was only her uncle, Eddie McDonough the Hornet who recognized that Melinda was child genius.
Split into simpler sentences: When she was growing up, Melinda McDonough's parents thought that there was something wrong with their child's brain. It was only her uncle, Eddie McDonough a.k.a. the Hornet, who recognized that Melinda was a child genius.