What is wrong with that solution?

public interface TurnipItem{
    String pull(Person person);
}

public class Solution {
    public static void main(String[] args) {
        List<Person> plot = new ArrayList<>();
        plot.add(new Person("Granddaughter", null));
        plot.add(new Person("Grandma", plot.get(0)));
        plot.add(new Person("Grandpa", plot.get(1)));
        plot.add(new Person("Turnip", plot.get(2)));
        TurnipStory.tell(plot);
    }
}

public class TurnipStory {
    static void tell(List<Person> items) {
        Person first;
        Person second;
        for (int i = 1; i < items.size(); i++) {
            first = items.get(i - 1);
            second = items.get(i);
            first.pull(second);
            System.out.println(items.get(i).pull(items.get(i)));
        }
    }
}

public class Person implements TurnipItem {

    private String name;
    private Person behind;

    public Person(String name, Person behind) {
        this.name = name;
        this.behind = behind;
    }

    public String pull(Person person) {
        if (behind != null) {
            String story = person.behind.name + " behind " + person.name;
            return story;
        }

        return person.name;
    }
}

public String pull(Person person) {
       if (behind != null) {
           String story = person.behind.name + " behind " + person.name;
           return story;
       }