Yes, that is exactly what you should tell them. 1  If two clauses are connected with a coordinating conjunction, it's a compound sentence. 2  If two clauses are connected with a subordinating conjunction, it's a complex sentence.
Trains were first- 1784, but cars weren't invented until 1890.
First class travel. First class is the most luxurious travel class of seats and service on a train, passenger ship, airplane, bus, or other system of transport.[1] It is usually more expensive than business class and economy class, and offers the best service and luxurious accommodation.