"NP V PP.theme whether S_INF"@en . . . . "P-WH-TO-INF; about-PP"@en . . . . "8.1"@en . . . "0.2"@en . "social_interaction(during(E), Agent_i, Agent_j) about(E, Theme)" . . "Agent [+plural] V {about} Theme [+wheth_inf]" . .