Returning the main document and the tag that matched in a sub document

Any help would be appreciated. I have a parent document that has an array
of sub documents which are tags that are associated with an objectid which
is used to identify another element. I am able to search on the tags and
get a response which returns the parent document which is exactly what I
want. However, since the tags map to an objectid, I'd like to know which
keywords matched the tag so I can get the objectid. I can compare the tags
on the client to figure out which matched, however, if using a stemming
analyzer, this wouldn't work and I'd like to find a better way if possible.
For example, if I search for "friend and families" I would get a return of
the document with id 249184, but I want to find out that we matched a tag
related to objectid='7'. Any suggestions on if I'm going in the right
direction to get the results I need or would there be another way to
structure this.

{
"_index": "myindex",
"_type": "mytype",
"_id": "249184",
"_version": 1,
"_score": 1,
"_source": {
"id": 249184,
"info":"I love elasticsearch",
"mytags": [
{
"objectid": 7,
"tags": [
"friend and families",
"brother"
]
},
{
"objectid": 3,
"tags": [
"sister"
]
}
]
}
}

The index is defined as follows (has been simplified for this example):

{
"mydata": {
"properties": {
"id": {
"type": "integer",
"index": "not_analyzed"
},
"info": {
"type": "string",
"analyzer": "standard"
},
"mytags": {
"type" : "object",
"properties": {
"objectid": { "type": "integer", "index":
"not_analyzed" },
"tags": { "type": "string", "analyzer": "standard"}
}
}
}
}
}

Thanks much

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