Keyonta Parnell has had asthma most of his young life, but it wasn’t until his family moved to the 140-year-old house here on Lemmon Street two years ago that he became one of the health care system’s frequent customers. “I call 911 so much since I’ve been living here, they know my name,” said the 9-year-old’s mother, Darlene Summerville, who calls the emergency medical system her “best friend.” (Hancock, Bluth and Trielli, 12/6) For more information click here.