Assertion: strip | /r/CreatedBy | hart's grandsons
Facets:
Source sentences:
text: After Hart's death in 2007, the strip began being produced by Hart's grandsons Mason Mastroianni (head writer and cartoonist) and Mick Mastroianni (writer for both B.C. and Hart's other creation, Wizard of Id), and Hart's daughter Perri (letterer and colorist).