Frederick Douglass, William Lloyd Garrison, Harriet Beecher Stowe, John Brown, and Angelina Grimke
The Mesopotamians made many technological discoveries. They were the first to use the potter's wheel to make better pottery, they used irrigation to get water to their crops, they used bronze metal (and later iron metal) to make strong tools and weapons, and used looms to weave cloth from wool.
A country does not need a clearly defined language
The translation in English is : what alternative technological solution allows the efficient use of water in the agricultural work of the family and community. Hope this helps :)