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While researching a topic, a student has taken the following notes:
• Francis Halzen is a Belgian particle physicist.
• Particle physicists study subatomic particles.
• Neutrinos are some of the least understood subatomic particles.
• Neutrinos were first discovered in the mid-twentieth century.
• Halzen is known for his discovery of high-energy astrophysical neutrinos.
• Francis Halzen is a Belgian particle physicist.
• Particle physicists study subatomic particles.
• Neutrinos are some of the least understood subatomic particles.
• Neutrinos were first discovered in the mid-twentieth century.
• Halzen is known for his discovery of high-energy astrophysical neutrinos.