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Up a table just to talk about it. because i love grammar so much. reporter: you couldn t think of anything more interesting? ( laughs ) but it s the anchor. like, right now, we re using words. this wouldn t even be happening. we would just be looking at each other. reporter: by day, ellen jovin runs a company training people in business communications. but her real passion is linguistics. she has a huge library of grammar and style books, from arabic to zulu. to share the knowledge and have some fun, last year, she began setting up her grammar table around new york city where she lives, and it went so well, she is now taking the table to the collective noun that is america. on the road around the country. reporter: we caught up with her here in new hope, pennsylvania, where ellen spent the day reminding people how to diagram sentences. i bet you remember this. reporter: .explaining when to use who and whom. whom, and do you know why? reporter: .and counseling people on their comma addictions. are you a comma user? yes, i am. i probably overuse them. we have a little bit more of an urge to leave them out sometimes.
Which you re referring. we re doing our best to check it out. reporter: but executing an official who has fallen out of favor wouldn t be uncharacteristic of the north korean dictator. kim jong-un is not a leader that the president of the united states should be friends with. and these are not behaviors that can simply be overlooked and brushed aside. reporter: it s important to note south korean media, as well as the government, have often been wrong on north korea. officials reported as executed have later appeared on national television very much alive. margaret. brennan: ramy, thank you. next up on the cbs evening news, a navy seal is released from military custody in a murder trial president trump is closely following. and later, in nearly a century of spelling bees, this has never happened. screen light.