In this study, <e1>flakeboard</e1> was produced from decommissioned <e2>guardrail</e2> posts that had been treated with chromated copper arsenate (CCA).
In this study, flakeboard
In this study, flakeboard was produced from decommissioned guardrail posts that had been treated with chromated copper arsenate (CCA).
<triplet> flakeboard <subject> guardrail <object> Entity-Origin(e1,e2)