[{"content":"I just said that before. I'll never be with you.","analysis":[{"sentence":"I just said that before.","sentiment":"neutral","subject":"I","expression":"say"},{"sentence":"I'll never be with you.","sentiment":"negative","subject":"I","expression":"be","label":"Farewell"}]}]

db.collection.find({analysis:{$exists:true,$elemMatch:{label:{$exists:false}}}})