
    In a social media content recommendation system, given a collection of content items where each item is represented by its unique content ID and an engagement priority score (lower score means higher priority), find the content ID of the item with the most favorable engagement score.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    In a social media content recommendation system, given a collection of content items where each item is represented by its unique content ID and an engagement priority score (lower score means higher priority), find the content ID of the item with the most favorable engagement score.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    In a social media content recommendation system, given a collection of content items where each item is represented by its unique content ID and an engagement priority score (lower score means higher priority), find the content ID of the item with the most favorable engagement score.
    

    """
    res = min(test_list, key=itemgetter(1))[0]
    return res