NoteTwitter location data is available only if a Twitter user chooses to activate it. For each individual Tweet, they can choose whether or not to include location data and which location they want to specify, regardless of their real location. For example, a user in New York City could select Edinburgh, Scotland as the purported origin of a Tweet. If they choose not to include location data, all the twitter.retweeted.place.* targets are unpopulated for that Tweet.
The country that corresponds to the location supplied for the original Tweet. This target holds no information about the Twitter user who made the Retweet.
When a Tweet is Retweeted, twitter.place.country is copied to twitter.retweeted.place.country.
1. Filter for Retweets of Tweets made by users who indicatted that they're located in Canada: