What are the keywords in the following sentence? politician leaves flowers at a memorial
flower, leave, memorial

What are the keywords in the following sentence? religious leader said mass at the stadium .
leader, mass, stadium

What are the keywords in the following sentence? snow in the market town this morning as parts continue to see wintry conditions
condition, continue, snow

What are the keywords in the following sentence? hundreds of trees are covered with colorful christmas lights and reflected on the surface of this pond
cover, light, reflect, surface, tree