def activitat(df, p, a):
    dfp = df[df['Park_Name'] == p]
    dfpa = dfp['Activities'].dropna()
    return dfpa[dfpa.str.contains(a)].count()


def parc_max_color(df, c):
    sel = df[df['Color'] == c]
    num = sel.groupby('Park_Name').size()
    return num.idxmax()