Part1.
Who was the famous door-to-door brush salesman ?
OPTIONS:
- description
- entity
- abbreviation
- human
- numeric
- location
****
Part2.
human


Part1.
Which U.S. President is buried in Washington , D.C. ?
OPTIONS:
- description
- entity
- abbreviation
- human
- numeric
- location
****
Part2.
human


Part1.
How does marl form and what mineral does it contain ?
OPTIONS:
- description
- entity
- abbreviation
- human
- numeric
- location
****
Part2.
description