How many albums did the Grateful Dead release in 1981?
2
3
3
3
3
2
4
3
2
4
3
2
4
3
2
5
4
3
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
3
1
2
5
4
7
3
1
2
5
4
7
3
1
2
6
5
4
7
3
1
2
0
6
5
4
7
1
2
6
5
0
4
7
8
1
2
6
5
4
7
0
8
1
2
6
5
4
7
8
1
0
6
5
7
8
1
6
5
0
9
7
13
10
8
1
6
5
9
7
13
10
8
1
6
9
7
13
10
8
1
6
9
7
13
10
8
6
9
7
13
10
8
6
9
7
13
10
8
6
12
9
7
13
10
8
11
6
12
9
7
13
10
8
11
6
12
9
7
13
10
8
11
6
12
9
7
13
10
8
11
6
12
9
7
3 albums
5 albums
111
2 albums
111