Twitter API and RT information

With the twitter search API you can request "only origi开发者_开发百科nal tweets" or "only retweets".

If you are requesting "everything", how can you determine for each result which one is a RT and which one is not ? If this is a RT, how can I know who the original author is ?

Am I missing an option to make the API add some "retweet information" to status results ?

---

Retweets should have retweeted_status and inside it the user object.