problem with bedtools complement: how to extract strand information?

Hi everyone,

I have a minor trouble when using bedtools complement.  My gff3 file contains Chr start end strand ect. information.  I want to use bedtools complement to extract other regions, however, the command  bedtools complement -i gff_file -g genome_file  gives me three columns: Chr, start, end.  The output does not have strand information.

Thank you very much.