In this case, since we know that the truncated tweets are due to a bug in the Twitter implementation with retweets (see previous discussion here), you might be able to filter based on strings starting with “RT” that are 140 characters long.
In this case, since we know that the truncated tweets are due to a bug in the Twitter implementation with retweets (see previous discussion here), you might be able to filter based on strings starting with “RT” that are 140 characters long.