Produce a sentence which has a cefr level of "a2" that contains the following words: barkan, katz, marvin.
Marvin Ammori, Ady Barkan, Elazar Barkan, Becky Bolin, Eszter Hargittai, Niva Elkin Koren, Amy Kapczynski, Eddan Katz, Zac Katz, Nimrod Koslovski, Orly Lobel, Katherine McDaniel, and Siva Vaidhyanathan all read the manuscript and provided valuable thoughts and insights.