Problem: A treaty is an official, express written agreement that states use to legally bind themselves. A treaty is the official document which expresses that agreement in words; and it is also the objective outcome of a ceremonial occasion which acknowledges the parties and their defined relationships.
How are states that enter into a treaty bound?
The answer is the following: legally

Problem: Nanjing is the transportation hub in eastern China and the downstream Yangtze River area. Different means of transportation constitute a three-dimensional transport system that includes land, water and air. As in most other Chinese cities, public transportation is the dominant mode of travel of the majority of the citizens. As of October 2014, Nanjing had five bridges and two tunnels over the Yangtze River, which are tying districts north of the river with the city centre on the south bank.
Where is the city centre located?
The answer is the following: on the south bank

Problem: In the Union of Utrecht of 20 January 1579, Holland and Zeeland were granted the right to accept only one religion (in practice, Calvinism). Every other province had the freedom to regulate the religious question as it wished, although the Union stated every person should be free in the choice of personal religion and that no person should be prosecuted based on religious choice. William of Orange had been a strong supporter of public and personal freedom of religion and hoped to unite Protestants and Catholics in the new union, and, for him, the Union was a defeat. In practice, Catholic services in all provinces were quickly forbidden, and the Reformed Church became the "public" or "privileged" church in the Republic.
What did the Union state that every person should be free to choose?
The answer is the following: personal religion

Problem: Hyderabad was historically known as a pearl and diamond trading centre, and it continues to be known as the City of Pearls. Many of the city's traditional bazaars, including Laad Bazaar, Begum Bazaar and Sultan Bazaar, have remained open for centuries. However, industrialisation throughout the 20th century attracted major Indian manufacturing, research and financial institutions, including Bharat Heavy Electricals Limited, the National Geophysical Research Institute and the Centre for Cellular and Molecular Biology. Special economic zones dedicated to information technology have encouraged companies from across India and around the world to set up operations and the emergence of pharmaceutical and biotechnology industries in the 1990s led to the area's naming as India's "Genome Valley". With an output of US$74 billion, Hyderabad is the fifth-largest contributor to India's overall gross domestic product.
What are three historic bazaars in Hyderabad?
The answer is the following:
Laad Bazaar, Begum Bazaar and Sultan Bazaar