Fig. 1
From: Auto-generating databases of Yield Strength and Grain Size using ChemDataExtractor

The xpath trees interpreted with the parsing rules for: (a) textual Yield Strength and (b) textual Grain Size applied to the example sentence: Ni–3at.%W–1.7at.%Fe (YS = 1850 MPa) has an average grain size is 0.8 mm.