Об­ра­зуй­те от слова DEMONSTRATE од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

The first public use of a Yablochkov candle took place in Paris in 1877. The Paris Exposition of 1878 gave Yablochkov a great opportunity to make a spectacular __________________ of his candle to the world audience.