Table 4.

Best parameter values achieved for each heuristic in the heuristic space

Heuristic	Parameter	Best value
		$EHH{R}_{\mathit{BERT}}$	$EHH{R}_{\mathit{TfIdf}}$
KNN	K	3	3
DT	Depth	32	64
	Criteria	Entropy	Entropy
RF	Depth	16	32
	Criteria	Entropy	Entropy
	n-estimators	200	200
NN	Hidden layer sizes	(128,64)	(128,64)
	solver	sgd	sgd
	activation	relu	relu
	Learning rate	0.001	0.001
SVM	Kernel	Linear	Linear
	C	1	1