def count_long_words(sentence, length):
    """Given a sentence, computes and returns the number of words equal to or longer
    than the provided threshold length

    Keyword arguments:
    sentence -- sentence or series of sentences
    length -- minimum length for a word to be counted
    """
    long_words = 0
    words = sentence.split()
    for word in words:
        if len(word) >= length:
            long_words += 1
    return long_words