TASK DEFINITION: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
PROBLEM: Marian Wilks:  If this is your home , why ca n't you get in ? I was watching you .
Jack Sugden: Prodigals are n't usually trusted with keys , even if they have time to collect _ one _ before going out to prodigalize .

SOLUTION: keys

PROBLEM: Lucky:  I know you 're smart , Spot , but how do you handle pressure ? Solve this simple word problem in say , thirty seconds .
Spot: Ah - ha , no problem ! Two trains are heading toward each other , _ one _ at twenty - five miles an hour and the other at forty . They 're fifty miles apart and getting closer on the same track , but with no time to throw the switch , they collide , head on . All aboard perish and it 's all my fault !
Lucky: Next .

SOLUTION: trains

PROBLEM: Linda Zwordling:  I do n't want a sex disease ! Especially _ one _ that 's assigned to me by my supervisor .

SOLUTION:
disease

