input: Write a function to create an instance of the "sru" class and call its "search" method, passing in a query string and optionally a collection name, start record number, maximum number of records to return, and record schema. The method should return a "response" object containing the results of the search. You can then use the various properties of the "response" object to extract specific information from the search results, such as titles, creators, and subjects.
  
  
  def search_kb_sru(query, collection=None, startrecord=1, maximumrecords=1, recordschema=None):
      sru_instance = sru()
      response_obj = sru_instance.search(query, collection=collection, startrecord=startrecord, maximumrecords=maximumrecords, recordschema=recordschema)
      return response_obj
  
  
  assert search_kb_sru("digital")==True # Assume True if there are search results
  assert search_kb_sru("nonexistent")==False # Assume False if there are no search results
  assert search_kb_sru("GGC", collection="GGC", startrecord=10, maximumrecords=5, recordschema="dcx")==True
  assert search_kb_sru("", collection="ANP")==False
  assert search_kb_sru("early", collection="DPO", recordschema="ddd")==True
output: def search_kb_sru(query, collection=None, startrecord=1, maximumrecords=1, recordschema=None):
      sru_instance = sru()
      response_obj = sru_instance.search(query, collection=collection, startrecord=startrecord, maximumrecords=maximumrecords, recordschema=recordschema)
      return response_obj