querying multiselectcheckbox

# this is my model

from django.db import models
from multiselectfield import MultiSelectField

TRACK_EVENTS_CHOICES = (
    ('100M', '100 Meter'),
    ('200M', '200 Meter'),
    ('400M', '400 Meter'),
    ('800M', '800 Meter'),
    ('1500M', '1500 Meter'),
    ('5000M', '5000 Meter'),

)

class Particiepents(models.Model):

    roll_no = models.IntegerField()
    Full_name = models.CharField(max_length=40)
    father_name = models.CharField(max_length=40)
    sex = models.CharField(max_length=10, choices=SEX_CHOICES)
    branch = models.CharField(max_length=20, choices=BRANCH_CHOICES)
    semester = models.CharField(max_length=10, choices=SEMESTER_CHOICES)
    track_events = MultiSelectField(max_length=30, null=True, blank=True, choices=TRACK_EVENTS_CHOICES, default="track_events")
    field_events = MultiSelectField(max_length=30, null=True, blank=True, choices=FIELD_EVENTS_CHOICES, default="track_events")


    def __str__(self):
        return self.Full_name

# I want to retrieve a individual lists of Full_name participating in different track_events(100m, 200m, 400m..)

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