How to use getElementsByTagName for specific node in Minidom

My XML looks like this

<TOPIC>
    <LIST>
        <Area>JKH</Area>
        <USED>
            <type id='123' />
            <type id='345' />
        </USED>
        <DEMAND>
            <type id='809' />
            <type id='321' />
        </DEMAND>
        <CLOSED>
            <type id='456' />
            <type id='765' />
        </CLOSED>
    </LIST>
</TOPIC>

Here i want to print only the id under <DEMAND>. i have tried the below code.

from xml.dom import minidom
root=minidom.parse('sample.xml')
tag=root.getElementsByTagName('type')
for i in tag: 
    print(i.getAttribute("id"))

But this is printing all the id values like below.

123
345
809
321
456
765

How can i get only 809 & 321 that are under <DEMAND> tag. I can give path in ElementTree but not sure how to give in getElementsByTagName ? Is it even possible in Minidom?

for demand in root.getElementsByTagName('DEMAND'):
    for tp in demand.getElementsByTagName('type'):
        print(tp.getAttribute("id"))