input: Write a function to create an instance of the "sru" class and search for a given query, optionally specifying the collection name, start record number, maximum number of records to return, and record schema. The function should return a "response" object containing the search results, which can be used to extract specific information such as titles, creators, and subjects.
  assert search_kb_sru("sample query", "ANP", 1, 10, "dcx").nr_of_records > 0
  assert search_kb_sru("another query", "DPO", 5, 5, "ddd").titles != []
  assert search_kb_sru("nonexistent query", "BYVANCK", 1, 1, "dcx") == False
  assert search_kb_sru("", "GGC", 1, 1, "dcx").nr_of_records == 0
output: def search_kb_sru(query, collection=None, start=1, maximum=10, schema="dcx"):
      sru_instance = sru(collection, start, maximum, schema)
      response = sru_instance.search(query)
      if response.nr_of_records == 0:
          return False
      return response