infinitive

I don't quite know what you're asking, but "the first person to do so" just means "the first person who died of radiation poisoning."

Thank you for comment.
My question is about to do so.
Let me give an example:

Ann married a person of another community and she was the first person in the family to do so.

Here Ann's act is voluntary so to do so fits the place, but in the sentence on Madame Curie, her death was caused by her experiments and not by her.

"To do so" has nothing to do with the action being voluntary or not!

Marie Curie was the first person to die of radiation poisoning.
Ann was the first person in my family to marry a foreigner.

"To do so" is just a reference to those verbs!

I understand. Thank you,teechr.

vsureshWhen I read it I understand that Madame Curie did not want to die of own experiments, but the use of infinitive to do so indicates. So, is it an error?

I think I understand your question. It just sounds like something is wrong there, doesn't it?

On July 4, 1934, Marie Curie died in Paris, killed by her own experiments. She died of radiation

vsureshWhen I read it I understand that Madame Curie did not want to die of own experiments, but the use of infinitive to do so indicates that she did.

Interesting interpretation. "first", "second", ..., "last" are followed by an infinitive. It has nothing to do with volition.

the first to die, the last to reac

Thank you very much, CJ.

I have understood it.

CalifJimYou may be overly influenced by the fact that "first to" is so often used to claim an accomplishment.

Yes, I thought so.
Now I have understood that the original sentence is all right.
Thank you, CJ.