 
 <prompt> ```Paul dey work for university. E dey part of one big project wey get 70 scientists for inside. Half of dem dey from Europe and one-fifth dey from Canada. The remaining ones dey from USA. How many scientists for this project dey from USA?``` <response>: ```From all di scientists wey dey participate for di project, half of dem dey from Europe, wey mean say 70 * 0.5 = 35 pipo.
Di number of researchers wey dey from Canada na 70 * 1/5 = 14 pipo.
Dat one mean say na 70 - 35 - 14 = 21 researchers dey from di USA.

Di answer go be 21.``` 