Complex sentence: The first Anna's Taqueria was founded by Michael Kamio and located in Brookline's Coolidge Corner in 1995 after a disagreement with his sister Mariko Kamio, who owns the competing Boca Grande chain.
Split into simpler sentences: The first Anna's Taqueria was founded by Michael Kamio and located in Brookline's Coolidge Corner in 1995. Kamio's sister, Mariko Kamio, owns the competing Boca Grande chain.