Based on details in The Riddle of the Rosetta Stone, what event helped scholars determine that the demotic language was related to the Egyptian language?

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

don't type random stuff. it's wierd.