code: public void setFreebase(String freebase) {
      if(freebase != null) {
        freebase = freebase.trim();
      }
      this.freebase = freebase;
    }
docs: Set link to Freebase.  Note: Provided only for entities that exist in this
  that exist in this linked data-set.
  
  @param freebase link to Freebase