| http://www.w3.org/ns/prov#value | - That is, each speaker is assigned a symbol including three characters (for example, FLh) where the first character ???F??? or ???B??? indicates whether the speaker is located at a front or rear position, the second ???L??? or ???R??? indicates whether the speaker is located at a left or right position, and the third ???h??? or ???l??? indicates whether the speaker is located at a higher or lower p
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