It maybe simple but I am not able to figure this out. I want to extract sublists based on the first item in each (if true extract/else leave). I tried by transposing the lists and flattening it but again how do I locate the position in the list. Please see the picture below. In this I want to extract those sublists containing 5610 as its first item. I used the clockwork pacakge’s List.SublistContains but it returns all false. I’m stuck here.