 
 <translate> Q: Passage: The first season of Spring Baking Championship premiered on April 25, 2015. The second season of the series premiered on April 10, 2016, and concluded on May 15, 2016. The third season premiered on March 12, 2017, with Jesse Palmer replacing Deen as host. The fourth season premiered on March 12, 2018, with Ali Khan replacing Palmer as host.

Question: Based on this passage, who is the host of season 4 spring baking championship?
Let's give stream of consciousness below
 <ibo> Q: Passage: Oge mbụ nke Spring Baking Championship malitere na Eprel 25, 2015. Oge nke abụọ nke usoro ahụ malitere na Eprel 10, 2016, wee mechie na Mee 15, 2016. Oge nke atọ bidoro na Machị 12, 2017, ebe Jesse Palmer nọchiri Deen dị ka onye ọbịa. Oge nke anọ bidoro na Machị 12, 2018, ebe Ali Khan nọchiri Palmer dị ka onye ọbịa.  Ajụjụ: Dabere na nke a, onye bụ onye ọbịa nke oge 4 nke asọmpi na-eme achịcha? Ka anyị nye stream nke nsụhọ n'okpuru 