Output whether tweet is a retweet or not

First of all, thank you very much for this script. It is very useful for my research. For my research, I need to know whether a tweet is a retweet or whether it is an original tweet in order to filter all the retweets out. To my understanding, the current "retweets" field is the number of retweets a post has received.

Does anyone know how to output the dummy value of whether a tweet is a retweet or not in the output_got.csv file?