Take a look at the partial results of this query:
{
"timeline_type": "votes",
"post_id": 2544061,
"creation_date": 1269993600,
"owner": {
// omitted for brevity
},
"action": "7 upvotes"
},
I'm sure the answer pointed out by this record never had 7 upvotes and there are no similar records for other answers.
So what does "action": "7 upvotes" mean?