scufl_graph cluster_sources Workflow Inputs cluster_sinks Workflow Outputs gi_option gi_option blastsimplifier blastsimplifier gi_option->blastsimplifier WORKFLOWINTERNALSINK_simplified_output simplified_output blastsimplifier->WORKFLOWINTERNALSINK_simplified_output WORKFLOWINTERNALSOURCECONTROL WORKFLOWINTERNALSOURCE_blast_file blast_file WORKFLOWINTERNALSOURCE_blast_file->blastsimplifier WORKFLOWINTERNALSINKCONTROL