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.

Q: Ben Bailey:  There are over 13000 cabs in New York City , but there is only _ one _ that pays you .

A: cabs
****
Q: Commander Charles 'Trip' Tucker III:  We 're gon na be showing the three greatest horror movies ever made : ' Frankenstein ' , ' Bride of Frankenstein ' , and ' Son of Frankenstein ' . We might even throw in ' Abbott and Costello Meet Frankenstein ' .
Sub-Commander T'Pol: I have no interest in horror movies .
Commander Charles 'Trip' Tucker III: How do you know if you 've never seen _ one _ ? You do n't have to see all of 'em , just ... come the first night . I promise , you 'll like it . Reanimated life forms , science run amok - they 're right up your alley .

A: movies
****
Q: Baby Sinclair:  What 's Refrigerator Day ?
Ethyl: I already told you .
Baby Sinclair: Oh , was I listening ?
Ethyl: Refrigerator Day is the day when dinosaurs celebrate the one invention that made modern civilization possible .
Baby Sinclair: Diapers ?
Ethyl: No , although that was an important _ one _ too , especially in summer .

A:
invention
****