Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Laurel Lance:  Can you remember the sound of Sara 's laugh ?
Nyssa al Ghul: When Sara was first brought to my father , the moment he weighed her apprenticeship or her execution , she bore witness to a demonstration of his power , _ one _ that inspired her and all that come before , but Sara ... laughed . It was so innocent , so genuine . That was the moment I fell in love with her , I think . All I knew , all I craved was to her laugh once more .

demonstration