public class Teacher extends Person {
    private String subject;
    private int yearsOfExperience;

    public Teacher(String name, int age, String subject, int yearsOfExperience) {
        super(name, age);
        this.subject = subject;
        this.yearsOfExperience = yearsOfExperience;
    }

    @Override
    public String getRole() { return "Teacher"; }

    @Override
    public String getExtraInfo() {
        return "Subject: " + subject + ", Experience: " + yearsOfExperience + " years";
    }
}