import re


def remove_retweet_notations(sentence):
    """
    Method to remove retweet notations in the given text

    parameters
    -----------
    :param sentence: str
    :return: str
        String without retweet notations
    """
    updated_sentence = re.sub(r'RT @[a-zA-Z0-9_/-]*:', '', sentence)
    return updated_sentence.strip()