Fix the grammar mistakes: After penicillin was discovered, the death rate of infection was largely decreased.
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The first time I saw, I was surprised to see that the, who was a very nice person, was a very nice person.
The first time I saw him, I was surprised to see that he was a very nice person.
The second time I saw him, I was surprised to see that he was a very nice person.
The third time I saw him, I was surprised to see that he was a very nice person.
The fourth time I saw him,