Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Cisco AIR-ANT4941 Aironet 2.2dBi 2.4GHz Dipole Black Antenna (Standard Rubber Duck) with RP-TNC Connector
Product description: This antenna operates in the 2.4- 2.5-GHz band and is designed for use with Cisco Aironet radio products utilizing a reverse-polarity threaded naval connector (RP-TNC).
Product feature: Cisco Aironet 2.4 GHz Articulated Dipole Antenna
Product price: $8.58
Product brand: Cisco
Target attributes: Gain
Answer: attribute: gain
value: 2.2dbi
source: product title