REMOVE

1. world's fair

WHAT

1. architecture (object genr … (1)
2. exhibitions (events) (1)
3. world's fair (1)

WHERE

1. Chicago, Illinois (1)
2. Illinois (state) (1)

WHO

1. Burnham, Daniel Hudson (1)
2. Olmsted, Frederick Law , … (1)

WHEN

1. 19th century (1)
2. Neoclassical (1)