Hive - grouping rows into map

I have a table like so

Col1   Col2   Col3
A      1      word1
A      2      word2
A      3      word3
A      4      word4
B      1      word1
B      3      word3

And I want to group col2 and col3 by col1, but keep col2 and col3 in a map, like so:

Col1   map(col2, col3)
A      [(1, word1), (2, word2), (3, word3), (4, word4)]
B      [(1, word1), (3, word3)]

I know there is a way to do this with just an array, as appears here: Grouping hive rows in an array of this rows

But I'm wondering if this is possible with a map (key/value pairs).