phase unphased
participant unphased:actor#1 "keeper" steps=ask#1
participant unphased:actor#2 "picker" steps=ask#2
participant unphased:actor#3 "final" steps=ask#3
handoff unphased:actor#1 -> unphased:actor#2 types="string"
handoff unphased:actor#2 -> unphased:actor#3
