or download this
Welcome to SWI-Prolog (Multi-threaded, 64 bits, Version 5.6.64)
Copyright (c) 1990-2008 University of Amsterdam.
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
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% /home/steve/Documents/i_prolog.pl compiled 0.00 sec, 30,056 bytes
SWI-Prolog engine already initialised at /usr/local/lib/perl/5.10.0/La
+nguage/Prolog/Yaswi/Low.pm line 63.