column 'start' included if DBpedia return value is empty table

[ablaette]

When running get_dbpedia_uris() on GermaParl, I have a result with column "start" for some legislative periods. Presumably, this results from ...

  dt_empty <- data.table(
    doc_id = character(),  
    start = integer(),
    text = character(),
    dbpedia_uri = character(),
    types = character()
  )