instruction:
Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.
question:
Profitability index ( PI ) , also known as profit investment ratio ( PIR ) and value investment ratio ( VIR ) , is the ratio of payoff to investment of a proposed project . It is a useful tool for ranking projects because it allows you to quantify the amount of value created per unit of investment .
answer:
Profitability index


question:
My Pet Monster is a plush doll first produced by American Greetings in 1986 . As one of the few plush dolls marketed to boys at the time , My Pet Monster was popular in the late 1980s and early 1990s . The doll has blue fur , horns and a fanged smile , and is recognizable by its orange plastic handcuffs . The handcuffs could also be worn by children and came with a breakaway link so that the child could simulate breaking the chain . Several versions of the doll have been released in various sizes and other attributes . Other characters were also created with brightly colored fur and unorthodox names like Gwonk , Wogster and Rark . Their popularity allowed a wealth of merchandise including coloring books , Golden Look - Look books , frame - tray puzzles and various other items .
answer:
My Pet Monster


question:
The iPod Nano ( stylized and marketed as iPod nano ) is a portable media player designed and marketed by Apple Inc . The first generation model was introduced on September 7 , 2005 , as a replacement for the iPod Mini , using flash memory for storage . The iPod Nano went through several differing models , or generations , since its introduction . Apple discontinued the iPod Nano on July 27 , 2017 , citing lack of consumer interest in the product resulting in poor sales .
answer:

iPod Nano