DB2 - Sql to get only the multiple records starting from 1 in row number function

Please help me in writing a sql script to get only the multiple records in row number function inclusive of rownumber 1 record.

Example:

***Column 1 Column2 Row_number***

 Apple   orange       1

 Apple   Grapes       2 

 Apple   Banana       3

 Orange  Strawberry   1

Need to get all the rows of apple starting from 1

I have tried below condition which is not working correctly.

WHERE Rnk >= 1
  AND Rnk < ( 1 + 50 )