def search_texts(args, parser):
    """Searches texts for presence of n-grams."""
    store = utils.get_data_store(args)
    corpus = utils.get_corpus(args)
    catalogue = utils.get_catalogue(args)
    store.validate(corpus, catalogue)
    ngrams = []
    for ngram_file in args.ngrams:
        ngrams.extend(utils.get_ngrams(ngram_file))
    store.search(catalogue, ngrams, sys.stdout)
Searches texts for presence of n-grams.