National Congress of Chile
It is a bicameral legislature composed of the Chamber of Deputies ( lower house ) , of 155 Deputies ( 120 before 2017 ) and by the Senate ( upper house ) , formed by 43 Senators ( 38 before 2017 ) which will increase its size to 50 senators after the next general election . 
<triplet> Senate <subj> 43 <obj> number of seats