Simplify the following text for a Grade 7 native English-speaking person.
Original: In 1963 , an extension was added , curving north from Union station , below University Avenue and Queen 's Park to near Bloor Street , where it turned west to terminate at St. George and Bloor Streets .
Simplified: In 1963 another part was added , that went north from Union station , below University Avenue and Queen 's Park to near Bloor Street , where it turned west to end at St. George and Bloor Streets .