t1:
  relation_id: 1
  k: 'test'
  v: 'yes'
  version: 1

t2:
  relation_id: 2
  k: 'test'
  v: 'yes'
  version: 1

t3:
  relation_id: 3
  k: 'test'
  v: 'yes'
  version: 1

mt_1:
  relation_id: 4
  k: 'tag1'
  v: 'val1'
  version: 1

mt_2:
  relation_id: 4
  k: 'tag2'
  v: 'val2'
  version: 1

mt_3:
  relation_id: 4
  k: 'tag3'
  v: 'val3'
  version: 1

mt_4:
  relation_id: 4
  k: 'tag4'
  v: 'val4'
  version: 1