From UNL Wiki
Cleft sentences are to be represented with the attribute @topic.
It's money that I love. = I love money.@topic It is Joey whom we are looking for. = We are looking for Joey.@topic It was from John that she heard the news. = She heard the news from John.@topic C'est Jean que je cherche = Je cherche Jean.@topic C'est à Paris que j'habite = J’habite à Paris.@topic