def find_biggest_pattern_in_patterns(dict):
    """
    dict: dictionary of translation vector->pattern
    
    Returns the biggest pattern and its corresponding translation vector.
    """
    max_length = -1
    pattern = None
    trans_vector = None
    for key in dict:
        if len(dict[key])>max_length:
            max_length=len(dict[key])
            trans_vector = key
            pattern = dict[key]
    return pattern, trans_vector