Why was Henry IV excommunicated by Pope Gregory VII

Ella

Explanation:

Process of elimination will help here

5 girls, 1 is farthest left and 5 is farthest right

"Mary is not sitting on the farthest right side; "

"Dorothy is not sitting the farthest to the left."

"Sylvia is not sitting the farthest to the left nor the farthest to the right."

Mary could be in seats 1 2 3 4.

Dorothy could be in seats 2 3 4 5.

Sylvia could be in seats 2 3 4. And not next to Dorothy

Kathy could be anywhere not next to Sylvia

Ella is sitting anywhere on the right of Dorothy

I suggest assigning each girl a number 1 to 5 and then go through the list and see can this arrangement work

Kathy 1

Dorothy 2

Mary 3

Sylvia 4

Ella 5