using System;

using System.Linq;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string line = "(LIST (LIST 'Abbott 'Ashley 'J ) '8697387888 'ajabbott@mail.university.edu 2.3073320999676614 )";

        // split on both space and closing bracket

        Console.WriteLine(line.Split(new[] { " ", ")" }, StringSplitOptions.RemoveEmptyEntries).LastOrDefault());

        // regex for gpa defined as digit followed by literal . followed by one or more digits

        var gpaRegex = new Regex(@"\d\.\d+");

        Console.WriteLine(gpaRegex.Matches(line)[0]);

    }

}