rule(np,vp,s,1).
rule(p,np,pp,1).
rule(v,np,vp,0.7).
rule(vp,pp,vp,0.3).
rule(np,pp,np,0.4).

lex(with,p,1).
lex(saw,v,1).
lex(astronomers,np,0.1).
lex(ears,np,0.18).
lex(stars,np,0.18).
lex(telescopes,np,0.1).



