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.
The first high-speed train to run was the Shinkansen in Japan, or more popularly known as the bullet train. Shinkansen started way back in 1964. To address issues in stability, some of these trains make use of tilting technology.