Jedi$-$Teams $[$master$,$ apprentice$]$

Jedi $[$name$,$ side, home$-$planet$]$

Government $[$leader$,$ planet, position$]$

Inhabitants $[$specie $,$ planet$]$

Write a relational algebra expression which will query $($by listing their names$)$ to find all planetary leaders who are apprentices and use the dark side of the force!

$[$for algebra operations use the following format: operator$[$fields$]($parameters$)$