How to deep clean your teeth<br>Schedule an appointment with the dentist. A deep cleaning is usually recommended after periodontitis has already been diagnosed. Set up an appointment with your dentist for your deep cleaning.
To deep clean your teeth the last step is not scheduling and appointment.
And should be an, but if the grammar is correct the last and not would likely confuse the system.
( z1 and :polarity - :op ( z2 schedule ) :op ( z3 appointment ) :domain ( z4 step :ARG2 ( z5 clean :ARG0 ( z6 you ) :ARG1 ( z7 tooth :part-of z6 ) :ARG1-of ( z8 deep ) ) :ord ( z9 ordinal-entity :value -1 ) ) )