ydb/yt/yql/tests/sql/suites/select/input4.txt

{"key"="0";"subkey"="10";"value"="FOO"};
{"key"="0";"subkey"="40";"value"="FOO"};
{"key"="1";"subkey"="10";"value"="FOO"};
{"key"="1";"subkey"="20";"value"="BAR"};
{"key"="1";"subkey"="40";"value"="BAR"};
{"key"="1";"subkey"="50";"value"="WAT"};
{"key"="2";"subkey"="40";"value"="WAT"};
{"key"="2";"subkey"="50";"value"="FOO"};
{"key"="2";"subkey"="60";"value"="BAR"};