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

It __________________ in 1978 when Don Cameron decided to create an event that would help balloonists from all over the world to get together. It was a great idea.