Are Dubs trained to do this? No, not at all.
https://wol.jw.org/en/wol/d/r1/lp-e/1102001099?q=witness+show+interest&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/1102001066?q=witness+show+interest&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/1102001083?q=witness+show+interest&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/202011445?q=witness+show+interest&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/202011405?q=witness+show+interest&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/202010286?q=jigsaw+puzzles+beautiful&p=par
https://wol.jw.org/en/wol/d/r1/lp-e/202014204?q=witness+show+interest&p=par