class_docstr: Abstract implementation of score function.
      
class_docstr_tok: ["Abstract","implementation","of","score","function","."]
docstr: Compute scores for negative samples.
          
docstr_tok: ["Compute","scores","for","negative","samples","."]
code: def get_neg_score(self, head, rel, tail, neg_head=False):
      """Compute scores for negative samples."""
      raise NotImplementedError(
          "get_neg_score of ScoreFunc not implemented!"
      )
  
imports: import math
  import numpy
  from numpy.random import RandomState
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle.nn.functional import log_sigmoid
label_desc: Use image node_id 3 for calling the ScoreFunc obj's underlying member method code with example usage: obj.get_neg_score(head, rel, tail, neg_head) without return types