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.
Ferdinand was an experimentalist and a missionary to China. He built his car in China. Hence you could rightly say, the first ever car was made in China. Carl Benz Karl Benz envented the first car.........or so many people believe Ferdinand Verbiest invented the first car in the year 1672 which was powered by steam.