$ swipl -l puzzle.pl
% /Users/whm/.plrc compiled 0.00 sec, 6 clauses
% /Users/whm/372/a9/puzzle.pl compiled 0.00 sec, 4 clauses
Welcome to SWI-Prolog (Multi-threaded, 64 bits, Version 6.6.6)
Copyright (c) 1990-2013 University of Amsterdam, VU Amsterdam
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to redistribute it under certain conditions.
Please visit http://www.swi-prolog.org for details.

For help, use ?- help(Topic). or ?- apropos(Word).

?- mishaps.
1. Farmer Brown was bitten by a snake.
2. Mrs. Brown was butted by the cow.
3. Son Johnny was attacked by a wasp.
4. Daughter was stung by a bee.
5. Mr. Reston was kicked by the mule.
true.

?-