How to filter (Azure) Collection of Edm.String by count or equility?

Question

I have models in the index (Azure), like:

[
  { list: [\'1\', \'2\', \'3\'] },
  { list: [\'1\', \'3\'] },
  { list: [\'5\', \'5\', \'5\'] },
  { list: [\'1\'] }