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"My obligation to my family means I need to visit them regularly. "

"My friend told me there was something in the box, but I didn't know what it was yet. "

"Upon her grandfather's death, she received a house as inheritance. "

"After suffering diahrroea, the patient was restricted to a diet of rice, cold meat, and yoghurt."

"The heavy snow was a major impediment to getting to school on time. "

"My son wore his backpack to school every day, carrying his books and lunch. "

"To buy a house, John took out a mortgage. "

"The heavy backpack was a burden for the student walking home from school. "

"He is a student of life."

"High-heeled shoes may be fashionable, but they can also be a hindrance to walking."

"The hiker was encumbered by his heavy backpack, making it difficult to climb the steep hill. "

"The complicated instructions on the new software difficult me from completing the project on time. "