Teacher : "What is the life period of Adolf Hitler" ?
Student : I don't know Ma'm
Teacher : Haven't you read text book ?
Student: Yes Ma'm. But I didn't find his life period.
Teacher: What nonsense you are taking. It is clearly given in the Text book. Adolf Hitler (1889-1945)
Student: Oooh!!! was it his life period ! Ithought it was his mobile number !