Christchurch East
The current MP is Poto Williams , a member of the New Zealand Labour Party who was first elected in the 2013 Christchurch East by-election . 
<triplet> Poto Williams <subj> New Zealand Labour Party <obj> member of political party <triplet> 2013 Christchurch East by-election <subj> Poto Williams <obj> successful candidate <subj> 2013 <obj> point in time