Input: Article: To relieve pressure from the expected German attack into Alsace-Lorraine, Napoleon III and the French high command planned a seaborne invasion of northern Germany as soon as war began. The French expected the invasion to divert German troops and to encourage Denmark to join in the war, with its 50,000-strong army and the Royal Danish Navy. It was discovered that Prussia had recently built defences around the big North German ports, including coastal artillery batteries with Krupp heavy artillery, which with a range of 4,000 yards (3,700 m), had double the range of French naval guns. The French Navy lacked the heavy guns to engage the coastal defences and the topography of the Prussian coast made a seaborne invasion of northern Germany impossible.

Now answer this question: What had Prussia been discovered building around big north German ports?

Output: defences

Input: Article: Like all the Romance languages, Catalan verbal inflection is more complex than the nominal. Suffixation is omnipresent, whereas morphological alternations play a secondary role. Vowel alternances are active, as well as infixation and suppletion. However, these are not as productive as in Spanish, and are mostly restricted to irregular verbs.

Now answer this question: What plays a secondary part in Catalan?

Output: morphological alternations

Input: Article: In 2001, she became the first African-American woman and second woman songwriter to win the Pop Songwriter of the Year award at the American Society of Composers, Authors, and Publishers Pop Music Awards. Beyoncé was the third woman to have writing credits on three number one songs ("Irreplaceable", "Grillz" and "Check on It") in the same year, after Carole King in 1971 and Mariah Carey in 1991. She is tied with American songwriter Diane Warren at third with nine songwriting credits on number-one singles. (The latter wrote her 9/11-motivated song "I Was Here" for 4.) In May 2011, Billboard magazine listed Beyoncé at number 17 on their list of the "Top 20 Hot 100 Songwriters", for having co-written eight singles that hit number one on the Billboard Hot 100 chart. She was one of only three women on that list.

Now answer this question: Who listed her at number 17 in their list of  Top 20 hot 100 Songwriters?

Output:
Billboard magazine