sentences:  In April 2012, National Public Radio featured Karlan at a Professionals in the City Speed Dating Event that consisted of 30 men and 30 women dating to show how one's use of pronouns in a conversation determines one's level of attraction to another person.In February 2014, The Washington Post featured Professionals in the City speed dating events as a key place for older singles to meet potential dates in Washington, DC, stating that Professionals in the City's "series of four- to eight-minute dates is an efficient way to decide who you're interested in.