Jarosław Kaczyński
Jarosław Aleksander Kaczyński ( ; born 18 June 1949 ) is a Polish politician and lawyer who is currently serving as leader of the Law and Justice party ( known by its Polish acronym PiS ) , which he co-founded in 2001 with his twin brother , Lech Kaczyński , who served as president of Poland until his death in 2010 . 
<triplet> Lech Kaczyński <subj> 18 June 1949 <obj> date of birth <subj> Law and Justice <obj> member of political party