Table 3.

Ablation experiment results of our model

Model	6b Factoid QA			7b Factoid QA			8b Factoid QA
	Sacc	Lacc	MRR	Sacc	Lacc	MRR	Sacc	Lacc	MRR
Baseline (BioBERT)	0.3973	0.6217	0.4838	0.4318	0.6164	0.5007	0.3848	0.5585	0.4492
+FF (Feature Fusion)	0.4328	0.6296	0.5066	0.4467	0.5998	0.5085	0.3928	0.5813	0.4636
+POS+FF	0.4363	0.5957	0.5024	0.4353	0.6171	0.5051	0.3994	0.5786	0.4660
+NER+FF	0.4471	0.6114	0.5072	0.4471	0.6114	0.5072	0.4053	0.5795	0.4678
Full model (BioBERT+POS+NER+FF)	0.4517	0.6294	0.5197	0.4444	0.6419	0.5165	0.3937	0.6098	0.4688

Bold values represent the highest results