Check out example codes for "how to split a string by in c#". It will help you in understanding the concepts better.
Code Example 1
string[] tokens = str.Split(new[] { "is Marco and" }, StringSplitOptions.None);
Code Example 2
char[] separator = new[] { ',' };
var result = aiTranslatedString.Split(separator, StringSplitOptions.RemoveEmptyEntries).ToList();
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