Table:
Clown

Clown at a Memorial Day parade, 2004

Medium	Physical comedy, acting, mime
Types	circus, contemporary circus, comedy, theatre, television, film
Ancestor arts	Jester
Descendant arts	Harlequinade, comedian
Originating era	18th – 21st century

For the cell at the 5th row and the 1st column in this table, provide its content. Output the target cell content as JSON in the format {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.

The target cell value in the 5th row and the 1st column is {"row_id":"5", "column_id":"1", "cell_value":"Descendant arts"}.