Пре­об­ра­зуй­те, если это не­об­хо­ди­мо, слово BREAK так, чтобы оно грам­ма­ти­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

John Lennon and Paul McCartney were friends. But most people believe that after the Beatles ______ up in 1970, the friendship between them was over.