I received a great deal of useful information from many people named below. In particular, thanks to Gilles Bernard for thoughtful interpretations, David Gaatone, Aurelien Max, John Reighard for helpful contexts, De Brabanter Philippe, Sylvain Kahane, Georges Rebuschi, Marie-Lucie Tarpent, Remy Viredaz for French intonation or accentuation to distinguish ambiguity and Neil Coffey, Eddy Gaytan, Pierre Larrivee, Uri Strauss for comments and suggestions for further research. Here are the original example and quetions. Somebody loves somebody. The summary of responses of 26 speakers are the followings.
Some speakers give a context for each interpretation as the followings.
Once again, thank you to all the above mentioned speakers for their help. A draft of a paper making use of the above information is now being written. I will send the paper to anyone who is interested in it.