c:> perl demo_csv

UNIVERSAL->import is deprecated and will be removed in a future perl at C:/Perl5-12-2/site/lib/Getopt/Declare.pm line 5
Unknown entry format: [absmith,1234567,20]
Unknown entry format: ["aesmith, the other one",7635656,DNS]
Unknown entry format: [cat,dog,22.2]
Unknown entry format: [7637843,dejones,66.7]
Unknown entry format: [rmwilliams,288721,88]
Unknown entry format: [help me,I'm trapped,in the marks system]
Unknown entry format: [vtthan,872829,94]

c:> perl -v

This is perl 5, version 12, subversion 2 (v5.12.2) built for MSWin32-x86-multi-thread