instruction:
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.
question:
Bobby Newman:  Okay , top five inventions of mankind : Um , the wheel , submarines , penicillin ...
Stephanie Layne: Slippers , creme brulee , spoons ...
Bobby Newman: Wait . But now we have six top - five inventions .
Stephanie Layne: Then let 's do ten ... and add _ four _ more .
Bobby Newman: Yes . I wanted to add dry - erase markers anyway .
answer:
inventions


question:
Dr. Gregory House:  You and Taub do a full work up . Observe her overnight . See if she has another seizure .
Dr. Gregory House: You
Dr. Gregory House: can go .
Dr. Chris Taub: Why does he get the night off ?
Dr. Gregory House: Because he brought a smokin ' hot babe .
Dr. Chris Taub: I
Dr. Chris Taub: have plans with my wife .
Dr. Gregory House: Yeah , nice try . You hate your personal life .
Dr. Gregory House: You
Dr. Gregory House: obviously do n't have _ one _ .
answer:
life


question:
Louisa Glasson:  Oh , and read him a bed time story . He seems to like the one about the talking fire engine .
Dr. Martin Ellingham: Hm . Highly unlikely he can grasp the concept of a fire engine , let alone _ one _ that 's apparently sentient .
answer:

engine