--- /dev/null
+#!/usr/bin/env perl
+use 5.014;
+use warnings;
+use lib '.';
+use Shiar_Sheet::DB;
+use Data::Dump 'pp';
+
+my $db = Shiar_Sheet::DB->connect;
+my $query = $db->select(
+ 'word w JOIN word a ON w.id = a.ref' => 'w.id, a.id',
+ {'a.lang' => undef}
+);
+say pp($query->map or exit 1);