[Mead] centroid cluster (urgent)

[odil]

hi all.
i recently joined in this milis.
i have problem in understanding about centroid cluster.
is there anybody can tell me how to make a cluster ?

in www.clsp.jhu.edu/ws2004/ 
calendar/School/TextSummSlides.ppt
say that there is open source mead in java
where i can find it ?

thx all

odil
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