# Sample originally from https://github.com/broadinstitute/centaur task hello { String addressee command { echo "Hello ${addressee}!" } output { String salutation = read_string(stdout()) } runtime { docker: "ubuntu@sha256:71cd81252a3563a03ad8daee81047b62ab5d892ebbfbf71cf53415f29c130950" } } workflow wf_hello { call hello output { hello.salutation } }