Sentence Extractor

/* Write a program that reads a keyword and some text from the console and prints all sentences from the text, containing that word. A sentence is any sequence of words ending with '.', '!' or '?'. */

namespace _04.SentenceExtractor
{
    using System;
    using System.Text.RegularExpressions;

    class SentenceExtractor
    {
        static void Main(string[] args)
        {
            string keyword = Console.ReadLine();
            string text = Console.ReadLine();
            string pattern = @"\b[A-Z][^.?!]*?\b" + keyword + @"\b.*?[!.?]";
            MatchCollection matches = Regex.Matches(text, pattern);
            Console.WriteLine("Output:");
            foreach (Match match in matches)
            {
                Console.WriteLine(match);
            }
        }
    }
}