Output Filter Option - Output Fields
This option prints out only those fields specified in the specified order. For example, -F:2:1:3 prints out the second field (output term), the first field (input term), and the third field (part of speech). The default is to print out all fields.
shell> lvg -f:i -F:2:1:3 help help|help|128 help|help|128 help|help|128 helps|help|128 help|help|1024 help|help|1024 help|help|1024 helps|help|1024 helped|help|1024 helped|help|1024 helping|help|1024