def get_similarity_task_tokens(args):
tokens = set()<EOL>for _, _, dataset in iterate_similarity_datasets(args):<EOL><INDENT>tokens.update(<EOL>itertools.chain.from_iterable((d[<NUM_LIT:0>], d[<NUM_LIT:1>]) for d in dataset))<EOL><DEDENT>return tokens<EOL>
Returns a set of all tokens occurring the evaluation datasets.