We observed that a <e1>box</e1> was actually placed inside the <e2>cornerstone</e2> with a variety of artifacts and documents commemorating the event and the history of Savannah.
We observed that a
We observed that a box was actually placed inside the cornerstone with a variety of artifacts and documents commemorating the event and the history of Savannah.
<triplet> box <subject> cornerstone <object> Content-Container(e1,e2)