TASK DEFINITION: You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.
PROBLEM: The return address is not required on postal mail. However, lack of a return address prevents the postal service from being able to return the item if it proves undeliverable; such as from damage, postage due, or invalid destination. Such mail may otherwise become dead letter mail.

SOLUTION: do you need to put return address on mail?

PROBLEM: The series has been renewed for a sixth season of 26 episodes which will premiere in Canada in September 2018,and in the UK on July 16, 2018.

SOLUTION: is there going to be season 6 of the next step?

PROBLEM: Unlike a four-stroke engine, whose crankcase is closed except for its ventilation system, a two-stroke engine uses the crankcase as part of the induction tract, and therefore, oil must be mixed with gasoline to be distributed throughout the engine for lubrication. The resultant mix is referred to as petroil. This oil is ultimately burned along with the fuel as a total-loss oiling system. This results in increased exhaust emissions, sometimes with excess smoke and/or a distinctive odor.

SOLUTION:
is there a difference in 2 stroke oil?