UNIX : grep command

take for example if i have a record like this:

first name last name birthdate phoneno
---------------------------------------------------------
john smith 23/8/77 979898
Mary lee 7/8/55 794546

how do i display the names of the employees whose first name is in lower caps? (if i simply say [a-z] it returns even the LAST NAME. i only wan the first name, for example)
do i use grep? if so, how do code it?

 

????? Still need this???????

prompt>grep ^[a-z] fileName |grep -v '^first'|cut -d' ' -f1,2

That grep's lines starting lower case, discards the line starting with 'first' and cuts fields 1 and 2 from the resulting lines delimted by spaces.