TypeError: raw_parse() missing 1 required positional argument: 'sentence'

Question

I tried this code below:

from nltk.parse.corenlp import CoreNLPParser
sdp = nltk.parse.corenlp.CoreNLPDependencyParser
result = list(sdp.raw_parse(sentence))

But I get this error

TypeError Traceback (most recent call last) ~\AppData\Local\Temp/ipykernel_2712/97028793.py in ----> 1 result = list(sdp.raw_parse(sentence)) TypeError: raw_parse() missing 1 required positional argument: 'sentence'

What should I do?