Conditional intersection for two datatype files

With a slightly more complex form than that described in item #5, the command slm makes a selection of clusters that have a minimum number of data for the first data type and simultaneously data for the second data type:

slm "data type 1" -gt limit -int "data type 2"

Selection on both datatypes is described in the next item.

Examples:

slm am -gt 5 -int gen
list clusters that have more than 5 Am stars and photometric data in the Geneva system
slm gk -gt 10 -int ric ngc
list the NGC clusters that have at least 10 red giants and measurements in the Cousins RI system