Dear philip,
i just got back from a trip to the grand canyon last week. this was my first choice for a vacation. i had heard it was one of the seven natural wonders of the world. i went with my cousin, whom we all like. you will meet her someday. i heard you went to alaska. whose idea was that? it must have been freezing!
we took pack mules all the way to the bottom of the canyon. everybody was very tired near the end of the trip. all in all, it was a great trip, but i need to get back to my science paper. it’s due tomorrow.
which sentence from the passage contains a relative pronoun?