Text processing line --- have irregular spaces between each treatment to {{}}

The average age of the number of sectors Remarks No. 
1 python 30 26 Single Dog 
2 Linux 26 30 did not target 
3 Operations 20 24 more girls

lst = []
with open("a1.txt", mode="r", encoding="utf-8") as f:
    first = f.readline().strip().split(" ")
    lst1 = []
    for le in first:
        if le != "":
            lst1.append(le)
    for line in f:
        dic ={}
        s = line.strip().split(" ")
        lst2 =[]
        for i in s:
            if i != "":
                lst2.append(i)
        for j in range(len(lst1)):
            dic[lst1[j]] = lst2[j]
        lst.append(dic)
print(lst)