[{docs:[{_id:ObjectId("662a416201ca2363543b6644"),name:"location-1",startsFrom:2,endsOn:5},{_id:ObjectId("662a416201ca2363543b6644"),name:"location-1",startsFrom:1,endsOn:3},{_id:ObjectId("662a416201ca2363543b6644"),name:"location-1",startsFrom:2,endsOn:4}]},{docs:[{_id:ObjectId("662a416201ca2363543b7777"),name:"location-3",startsFrom:2,endsOn:4},{_id:ObjectId("662a416201ca2363543b7777"),name:"location-3",startsFrom:1,endsOn:3}]}]

db.collection.aggregate([/** start: example "previous stages"*/{$unwind:"$docs"},{$replaceWith:"$docs"},/** end: example "previous stages"*/{$match:{"startsFrom":{$lte:2},"endsOn":{$gte:2}}},{$group:{_id:"$_id",first_doc:{$first:"$$ROOT"}}},{$replaceWith:"$first_doc"}])