Conversation so far:
how many seats are on a boeing 737-800
The Boeing 737-800 seats 162 passengers in a two-class layout or 189 passengers in a one-class layout.
When was the Boeing 737-800 first lounched
The 737-800 Boeing was launched on September 5, 1994.

Question: When was the original line first made
Self-contained rewrite: When was the original Boeing line of airplanes first made