DBpedia instance_types_en.ttl contains duplicate entries, which are distinguished only by _[number] suffix. This is present both in 2016_04 dump as well as in live DBpedia.
Both resources are connected via dbo:personFunction, for other resources the connection is a different property.
The 2016_04 dump additionally contains
http://dbpedia.org/resource/Ada_Lovelace__2 … 12
What is the semantics of this possible duplicate entries?