TASK DEFINITION: Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
PROBLEM: a standing start is a type of start in auto racing events where cars are standing still when the race begins.

SOLUTION: standing start

PROBLEM: metal gear is an action-adventure stealth video game franchise made by konami.

SOLUTION: metal gear

PROBLEM: opium is a narcotic resin produced from opium poppies "(papaver somniferum)".

SOLUTION:
opium