Sample Output:
>~/bin/perlwhich  -m 'Storable'  
/util/lib/perl5.8/lib/5.8.0/alpha-dec_osf -- Storable (2.04) - persistence for Perl data structures
/util/lib/perl5.8/lib/5.8.0 -- Memoize::Storable (0.65) - store Memoized data in Storable database