Here's a short story:

Milk is a white liquid produced by the mammary glands of mammals. It is the primary source of nutrition for infant mammals (including humans who breastfeed) before they are able to digest other types of food. Early-lactation milk contains colostrum, which carries the mother's antibodies to its young and can reduce the risk of many diseases. It contains many other nutrients including protein and lactose. 

As an agricultural product, milk is extracted from non-human mammals during or soon after pregnancy. Dairy farms produced about 730 million tonnes of milk in 2011, from 260 million dairy cows. India is the world's largest producer of milk, and is the leading exporter of skimmed milk powder, yet it exports few other milk products. The ever increasing rise in domestic demand for dairy products and a large demand-supply gap could lead to India being a net importer of dairy products in the future. The United States, India, China and Brazil are the world's largest exporters of milk and milk products. China and Russia were the world's largest importers of milk and milk products until 2016 when both countries became self-sufficient, contributing to a worldwide glut of milk. 

Throughout the world, there are more than six billion consumers of milk and milk products. Over 750 million people live in dairy farming households. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What contains antibodies?
Guess: colostrum,

Question: Does it have other nutrients?
Guess: Yes

Question: like what?
Guess: protein

Question: any others mentioned?
Guess: Yes

Question: what?
Guess: lactose

Question: How many people consume milk worldwide?
Guess: more than six billion

Question: who is the largest producer?
Guess: India

Question: what to they export the most of?
Guess: skimmed milk powder

Question: How many people live in dairy farming households?
Guess: Over 750 million

Question: and how much is produced?
Guess: about 730 million tonnes of milk in 2011

Question: from how many cows?
Guess: 260 million

Now answer the following question in the same format.

Question: Who uses milk as their primary source of nutrition?

infants