Assertion: violet's role | /r/HasProperty | key
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Source sentences:
text: Violet's personality was much more forceful and recognizable compared to the more generic early Peanuts characters like Patty and Shermy, which allowed her to survive slightly longer than those founding characters when a new wave of characters; Linus, Lucy and Schroeder; were introduced (as an example, Violet has key roles in the TV specials A Charlie Brown Christmas