// This filters out replies (that Twitter understands are replies)
function has_in_reply_to_status_id(tweet) {
    if (tweet.in_reply_to_status_id === null) return false;
    else return true;
}

// This filters out tweets that start with a mention, which are almost always replies
function is_user_mention_at_start(tweet) {
    if (tweet.entities.user_mentions.length > 0) {
        if (tweet.entities.user_mentions[0].indices[0] === 0) return true;
    }
}