15782
The results of experimental studies of the valence electronic structure of tetrahydrofuran employing He I photoelectron spectroscopy as well as Electron Momentum Spectroscopy ( EMS ) have been reinterpreted on the basis of Molecular Dynamical simulations employing the classical MM3 force field and large - scale quantum mechanical simulations employing Born - Oppenheimer Molecular Dynamics in conjunction with the dispersion corrected omega B97XD exchange - correlation functional .
 Chemical: tetrahydrofuran; Chemical: He
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: tetrahydrofuran; Chemical: He