Question: Read this and answer the question

Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. It consists of cells, and the cell walls are composed of micro-fibrils of cellulose (40% – 50%) and hemicellulose (15% – 25%) impregnated with lignin (15% – 30%).

What substance is hemicellulose impregnated with?
Answer: lignin
Question: Read this and answer the question

In 2011, documents obtained by WikiLeaks revealed that Beyoncé was one of many entertainers who performed for the family of Libyan ruler Muammar Gaddafi. Rolling Stone reported that the music industry was urging them to return the money they earned for the concerts; a spokesperson for Beyoncé later confirmed to The Huffington Post that she donated the money to the Clinton Bush Haiti Fund. Later that year she became the first solo female artist to headline the main Pyramid stage at the 2011 Glastonbury Festival in over twenty years, and was named the highest-paid performer in the world per minute.

When did this leak happen?
Answer: 2011
Question: Read this and answer the question

On 27 June, Rhee evacuated from Seoul with some of the government. On 28 June, at 2 am, the South Korean Army blew up the highway bridge across the Han River in an attempt to stop the North Korean army. The bridge was detonated while 4,000 refugees were crossing the bridge, and hundreds were killed. Destroying the bridge also trapped many South Korean military units north of the Han River. In spite of such desperate measures, Seoul fell that same day. A number of South Korean National Assemblymen remained in Seoul when it fell, and forty-eight subsequently pledged allegiance to the North.

What bridge were refugees attempting to cross when it was blown up by the South Korean Army?
Answer:
Han River